Atari2600land is working on Chu Chu Rocket for the Atari 2600.

Quote:

New level, gang! I noticed I actually didn’t solve the mice lining-up with the squares problem, but I think I fixed it this time. And, just to avoid legal problems with Sega and Sonic Team, I think I’m going to name the final game “Nice Mice”. Anyone want to try and make a title screen for me with the title screen bB thing, that’d be really nice of you.

http://www.atariage.com/forums/topic/156917-chu-chu-rocket/