Unexpanded and non-cartridge recommendation?

[NorthWay]

Could someone please recommend a game for an unexpanded machine that is not a cartridge? Doesn't need to be big or deep, just reasonably entertaining.
(I'm looking for something to try and port to the C= 64 so it kind of needs to not have a version for that already

[RobertBe]

All of Jeff's games?

Oops, did I say that?
Robert Bernardo
Fresno Commodore User Group
http://videocam.net.au/fcug

[orion70]

Jeff's games, definitely. Another good conversion would be Antimatter Splatter - I always found it hypnotizing.