Touch Arcade: Look through my game collection and you'll find at least five copies of Mortal Kombat, Doom on assorted media, and more copies of Street Fighter II than Ryu players spam fireballs in a single round. Some games are so nice I've just got to buy them twice. Or more. The iPhone release of Crazy Taxi [$4.99] marks my fourth foray through the boulevards of Sega's imitation San Francisco, and it's still a pretty good game. Granted, the fun is still somewhat hampered by old design decisions, but Crazy Taxi feels good and whole on mobile.