Everytime I play Comix Zone on my Genesis 1, it locks up, freezes or sometimes resets without warning.

All my other Genesis games work without any problems.

Yet once I pop in the game in a Genesis 2, no problems at all....until I got to stage two and one of the characters froze on screen, haulting my progress.

I tried cleaning it a few times and nothing so far...

could it be the system or just the game?