Dev - Also, on form submission, use GD to resize the image as a new thumbnail file
Dev - In the submission form, you can now upload a banner image
Your goal: Escape. How? Find the exit, though you will need to gather all 4 powerups (run, swim, high-jump, and fly) to do it.
This game features acceleration movement, moving platforms, spring blocks, spring platforms, reverse-gravity blocks, swimming, motions trails (find the unlock), mirrored levels (find it in a special room), and a nice checkpoint system.
Gameplay is non-linear, feel free to roam the little world of about 20 rooms; it will last you a little while.
Best of all, it is opensource! Feel free to learn, or use. Just give a little in return and point people this way.