C64 games? Geez, where do we start with this one? Akira, Amigaboy, help me out here!
Gotta throw in Turrican 1 or 2, Creatures 1 or 2, Monty on the Run, IK+, Pitstop II, Summer Games, California Games, Defender of the Crown, Combat School, Bubble Bobble, Ghost 'n'Goblins, & G.I. Joe.
I can't vouch for how well they'll run on a mobile phone C64 emulator, just under ordinary lameulation they'll run fine.
There'll be a heap more to add to the list, it really depends what type of games you like really!