“TINS (yet another speedhack variant — this one named ‘TINS is not Speedhack’) just finished, and had a pretty solid entry called ”http://allegro.cc/forums/thread/590831">Ballz. Surprisingly polished for a 72 hour speedhack entry, I think.
It’s a platformer with the trick that you don’t control your direction, only when you jump. As it progresses they add some special abilities to mix it up. Pretty simple, but it’s well done. Oh, and it has immature dialog, and sourcecode available.
The difficulty ramps up kinda absurdly at some point — hopefully eventually they’ll release a version I can actually beat …" – Zaphos