I just put Cologne on my Game Boy Advance, and it's never smelled better. Specifically, I put the Cologne emulator on my GBA using a flash cartridge, and it runs pretty well there. Props to Flubba for yet another great emulator on a system which doesn't seem like it could handle them.
Some ColecoVision games worth trying include Pepper II, Tarzan, Mr. Do's Castle, Spy Hunter, and Star Trek. Flipper Slipper is also good for a few chuckles, if just for the absurdity of playing Breakout at a fish hatchery, complete with a hungry bear walled up in a room at the top of the screen. It's like Geebee from Namco crossed with an episode of Marty Stauffer's Wild America.