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You cannot steal images for your game. They want you to make it cross platform. You cannot use any commercial libraries. If you use some personal libraries, you have to supply the source code to everyone.
Your game has to run on minimal hardware. When you are done, you must share all of your source code. That does not mean that you have to open source your code. But you must post it all out there. You get one extra day to package your code. This all sounds like a fun idea. Maybe I can unleash some kind of roguelike on them. It might be tough to get it all done in 48 hours though.