I have a published quest game and I cannot figure out how to edit it although it is published! I can only figure out how to change the title and the description. Thank you!

If online version:
Um... you edit it, then publish it...

If offline version:
Edit the file you have, then go to your games, look there, and... beats me, I'm just guessing.

Offline you have to upload the new file over the old one.