2d_physics - feeling that something is unfinished...
3dgscopter - funny, espeshially falling and RIP picture

collisiondetectionwithprojections - very good work, i really like it
invisibleshadow - i didnt understand even if i shooted a bullet or not
lander - emm... dont know what to say, but i dont like it, sry

lightmaterialviewer - good work for beginner, but also dont finished
little2dgame - i didnt understand the point of the game
megaman - reminds me old-style games... very nice
omgman - i liked those effects and that raven xD
Pinniball - effects are nise, but a little boring, in addition ball always jumps at 45 angles.
robotshowcase - i also didnt understand, what it is
supermario - ahh, my old friend Mario ^^
texteffects - extremely nice and usefull
typingtiles - also good game for those people, who would like to learn keyboard

worm_dieder - i liked music, but i didnt understand, how to control worms... also there is no info, so thats not good.
Thats a pitty that i cannot vote for 2 or 3 works... but, as i need to chose one, i'll vote for ****Omgman**** because of nice arts.