Infinity Blade 1 & 2
FIFA 13 HD
Tower Defense HD
Kingdom Rush HD
TAMAGO, an/a app/game where you have to click an egg 1,000,000 times, and then the egg will hatch.
No, seriously i liked the iPhone version of Guitar Hero or Tap Tap Revenge, but thats because i've spent to much of my life playing Guitar Hero for PS2/Xbox 360.
Also iCopter really made my day back in 2009.