An error that says "Error running script: Error compiling expression 'IsSwitchedOn(room)': Unknown object or variable 'room'" keeps popping up whenever I play the game. The proof is in the attachment. Play the game or see the walkthrough to see the error. Please respond, ASAP, please; I need to create the game as soon as I can. =]

this is the default new game code (excluding the game's name and the unique generated game's id, lol):

<asl version="540">
  <include ref="English.aslx" />
  <include ref="Core.aslx" />
  <game name="Testing Game Stuff">
    <gameid>d83ba5bb-2e3c-4f31-80c9-3e88a2dc082c</gameid>
    <version>1.0</version>
	<firstpublished>2013</firstpublished>
  </game>
  <object name="room">
    <inherit name="editor_room" />
    <object name="player">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
    </object>
  </object>
</asl>

You no longer have any room named "room", so thus the error, as the game engine is looking for a room named "room". So, just change your "IsSwitchedOn(room)" to "IsSwitchedOn(Jungle)", at least I presume you want the "Jungle" room to be used in your "start" script, anyways. If not, then just put in whatever name of the room that you want it to be.

Also, that same "start" script that is causing the error, is incompleted too:

<start type="script">
  if (IsSwitchedOn(room)) {
    // (you need some code here, as this "start" script in incomplete~empty)
  }
</start>

and here's your full game code, unchnaged:

<!--Saved by Quest 5.4.4873.16527-->
<asl version="540">
  <include ref="English.aslx" />
  <include ref="Core.aslx" />
  <game name="Dragon Ball - Quest for the Dragon Balls">
    <gameid>7955c9fa-c5d1-4650-bb7a-575ff9d5bdc0</gameid>
    <version>0.1</version>
    <firstpublished>2013</firstpublished>
    <subtitle>Search for All of the Dragon Balls!</subtitle>
    <author>Akira Toriyama's Apprentice</author>
    <description><![CDATA[Hint: Look in buildings, you will, sometimes, find useful things in there.<br/><br/>VERSION: 0.1<br/>Not Done Yet!]]></description>
    <category>Fantasy</category>
    <difficulty>Easy</difficulty>
    <cruelty>Tough</cruelty>
    <showhealth />
    <showscore type="boolean">false</showscore>
    <defaultfontsize type="int">12</defaultfontsize>
    <backgroundimage>DragonBalls.jpg</backgroundimage>
    <setbackgroundopacity type="boolean">false</setbackgroundopacity>
    <gridmap />
    <autodescription_youarein_newline />
    <autodescription_youcansee_newline />
    <autodescription_youcango_newline />
    <autodescription_description_newline />
    <attr name="autodescription_youcansee" type="int">2</attr>
    <appendobjectdescription type="boolean">false</appendobjectdescription>
    <defaultfont>'Times New Roman', Times, serif</defaultfont>
    <defaultwebfont>'Comic Sans MS', cursive, sans-serif</defaultwebfont>
    <pov type="object">player</pov>
    <start type="script">
      if (IsSwitchedOn(room)) {
      }
    </start>
  </game>
  <object name="Jungle">
    <inherit name="editor_room" />
    <usedefaultprefix />
    <description>The Jungle, next to your Grandpa Gohan's house.</description>
    <dark />
    <darkroomdescription>This place is dark. Hope you have a flashlight!</darkroomdescription>
    <object name="player">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="namedmale" />
      <prefix>Goku</prefix>
      <suffix>Son</suffix>
      <look><![CDATA[No time to admire! Find the <b>Dragon Balls</b>!]]></look>
      <alt type="stringlist">
        <value>Goku</value>
      </alt>
      <displayverbs type="stringlist">
        <value>Look at</value>
      </displayverbs>
      <attr name="pov_look"><![CDATA[No time to admire! Find the <b>Dragon Balls</b>!]]></attr>
      <alias>Goku</alias>
    </object>
    <object name="Car of Bulma">
      <inherit name="editor_object" />
      <alt type="stringlist">
        <value>Car</value>
      </alt>
      <usedefaultprefix />
      <lightsource type="boolean">false</lightsource>
      <lightstrength>strong</lightstrength>
      <visible />
      <unlock type="script">
        msg ("You unlock Bulma's Car and see a capsule; you take it. You also notice that it has the word \"HOUSE\" inscribed on it.")
        AddToInventory (House Capsule)
      </unlock>
      <object name="House Capsule">
        <inherit name="editor_object" />
        <alt type="stringlist">
          <value>House</value>
        </alt>
        <take />
        <takemsg>You got a House Capsule! You can now use it [once] to generate a house, wherever, and whenever you want!</takemsg>
        <drop type="boolean">false</drop>
        <volume type="int">10</volume>
        <lightsource type="boolean">false</lightsource>
        <use type="script">
          create exit ("House", Jungle, House)
        </use>
        <object name="House">
          <inherit name="editor_room" />
          <grid_parent_offset_auto />
          <exit alias="west" to="Jungle">
            <inherit name="westdirection" />
          </exit>
          <object name="Refrigerator">
            <inherit name="editor_object" />
            <inherit name="openable" />
            <isopen type="boolean">false</isopen>
            <openscript type="script">
              AddToInventory (Plate of Hamburgers)
            </openscript>
            <object name="Plate of Hamburgers">
              <inherit name="editor_object" />
              <inherit name="plural" />
              <alias>Hamburgers</alias>
              <usedefaultprefix />
              <look>You look at the Hamburgers, drool, and think, "Wow, those look goo-ood!"</look>
              <scenery type="boolean">false</scenery>
              <use type="script">
                IncreaseHealth (15)
              </use>
            </object>
          </object>
        </object>
      </object>
    </object>
    <exit alias="north" to="House of Grandpa Gohan">
      <inherit name="northdirection" />
      <lightsource />
      <lightstrength>strong</lightstrength>
    </exit>
    <exit alias="east" to="House">
      <inherit name="eastdirection" />
    </exit>
  </object>
  <object name="House of Grandpa Gohan">
    <inherit name="editor_room" />
    <exit alias="south" to="Jungle">
      <inherit name="southdirection" />
    </exit>
    <object name="Four Star Dragon Ball">
      <inherit name="editor_object" />
      <take type="script">
        msg ("You found a Dragon Ball!")
      </take>
      <drop type="boolean">false</drop>
      <use type="boolean">false</use>
    </object>
  </object>
  <walkthrough name="Problem">
    <steps type="simplestringlist">
      event:JS_GridSquareClick;-3;-1
      event:JS_GridSquareClick;-3;3
      event:JS_GridSquareClick;-2;3
    </steps>
  </walkthrough>
</asl>

here's your full game code, changed:

<!--Saved by Quest 5.4.4873.16527-->
<asl version="540">
  <include ref="English.aslx" />
  <include ref="Core.aslx" />
  <game name="Dragon Ball - Quest for the Dragon Balls">
    <gameid>7955c9fa-c5d1-4650-bb7a-575ff9d5bdc0</gameid>
    <version>0.1</version>
    <firstpublished>2013</firstpublished>
    <subtitle>Search for All of the Dragon Balls!</subtitle>
    <author>Akira Toriyama's Apprentice</author>
    <description><![CDATA[Hint: Look in buildings, you will, sometimes, find useful things in there.<br/><br/>VERSION: 0.1<br/>Not Done Yet!]]></description>
    <category>Fantasy</category>
    <difficulty>Easy</difficulty>
    <cruelty>Tough</cruelty>
    <showhealth />
    <showscore type="boolean">false</showscore>
    <defaultfontsize type="int">12</defaultfontsize>
    <backgroundimage>DragonBalls.jpg</backgroundimage>
    <setbackgroundopacity type="boolean">false</setbackgroundopacity>
    <gridmap />
    <autodescription_youarein_newline />
    <autodescription_youcansee_newline />
    <autodescription_youcango_newline />
    <autodescription_description_newline />
    <attr name="autodescription_youcansee" type="int">2</attr>
    <appendobjectdescription type="boolean">false</appendobjectdescription>
    <defaultfont>'Times New Roman', Times, serif</defaultfont>
    <defaultwebfont>'Comic Sans MS', cursive, sans-serif</defaultwebfont>
    <pov type="object">player</pov>
    <start type="script">
      if (IsSwitchedOn(Jungle)) {
        // (you need some code here, as this "start" script in incomplete~empty)
      }
    </start>
  </game>
  <object name="Jungle">
    <inherit name="editor_room" />
    <usedefaultprefix />
    <description>The Jungle, next to your Grandpa Gohan's house.</description>
    <dark />
    <darkroomdescription>This place is dark. Hope you have a flashlight!</darkroomdescription>
    <object name="player">
      <inherit name="editor_object" />
      <inherit name="editor_player" />
      <inherit name="namedmale" />
      <prefix>Goku</prefix>
      <suffix>Son</suffix>
      <look><![CDATA[No time to admire! Find the <b>Dragon Balls</b>!]]></look>
      <alt type="stringlist">
        <value>Goku</value>
      </alt>
      <displayverbs type="stringlist">
        <value>Look at</value>
      </displayverbs>
      <attr name="pov_look"><![CDATA[No time to admire! Find the <b>Dragon Balls</b>!]]></attr>
      <alias>Goku</alias>
    </object>
    <object name="Car of Bulma">
      <inherit name="editor_object" />
      <alt type="stringlist">
        <value>Car</value>
      </alt>
      <usedefaultprefix />
      <lightsource type="boolean">false</lightsource>
      <lightstrength>strong</lightstrength>
      <visible />
      <unlock type="script">
        msg ("You unlock Bulma's Car and see a capsule; you take it. You also notice that it has the word \"HOUSE\" inscribed on it.")
        AddToInventory (House Capsule)
      </unlock>
      <object name="House Capsule">
        <inherit name="editor_object" />
        <alt type="stringlist">
          <value>House</value>
        </alt>
        <take />
        <takemsg>You got a House Capsule! You can now use it [once] to generate a house, wherever, and whenever you want!</takemsg>
        <drop type="boolean">false</drop>
        <volume type="int">10</volume>
        <lightsource type="boolean">false</lightsource>
        <use type="script">
          create exit ("House", Jungle, House)
        </use>
        <object name="House">
          <inherit name="editor_room" />
          <grid_parent_offset_auto />
          <exit alias="west" to="Jungle">
            <inherit name="westdirection" />
          </exit>
          <object name="Refrigerator">
            <inherit name="editor_object" />
            <inherit name="openable" />
            <isopen type="boolean">false</isopen>
            <openscript type="script">
              AddToInventory (Plate of Hamburgers)
            </openscript>
            <object name="Plate of Hamburgers">
              <inherit name="editor_object" />
              <inherit name="plural" />
              <alias>Hamburgers</alias>
              <usedefaultprefix />
              <look>You look at the Hamburgers, drool, and think, "Wow, those look goo-ood!"</look>
              <scenery type="boolean">false</scenery>
              <use type="script">
                IncreaseHealth (15)
              </use>
            </object>
          </object>
        </object>
      </object>
    </object>
    <exit alias="north" to="House of Grandpa Gohan">
      <inherit name="northdirection" />
      <lightsource />
      <lightstrength>strong</lightstrength>
    </exit>
    <exit alias="east" to="House">
      <inherit name="eastdirection" />
    </exit>
  </object>
  <object name="House of Grandpa Gohan">
    <inherit name="editor_room" />
    <exit alias="south" to="Jungle">
      <inherit name="southdirection" />
    </exit>
    <object name="Four Star Dragon Ball">
      <inherit name="editor_object" />
      <take type="script">
        msg ("You found a Dragon Ball!")
      </take>
      <drop type="boolean">false</drop>
      <use type="boolean">false</use>
    </object>
  </object>
  <walkthrough name="Problem">
    <steps type="simplestringlist">
      event:JS_GridSquareClick;-3;-1
      event:JS_GridSquareClick;-3;3
      event:JS_GridSquareClick;-2;3
    </steps>
  </walkthrough>
</asl>

and if you don't know how to work with code yet, just let me~us know, and I~we will help you with doing this in the GUI~Editor.