accommodations for color blindness
Frenzic - finger twiddling, attention monopolizing game. notable because it has an option in the preference panel to change colors to compensate for color blindness:
lots of games are harder to play with fewer colors; I can't play Set with my father because the green, red, and purple aren't distinguishable enough to him (he has red-green color blindness).
game via daringfireball, who linked to the iPhone/iPod Touch web version.