Same problem 4.2.2 Slimrom s2 Skyrocket. Going to be 4.3 in a few days to.
Got CM 4.2.2 on my Note 2, whilst the game is playable the touch input can sometimes freeze whilst the game runs in the background. Going to homescreen and back will cause the OS to pop up the app unresponsive message and force closing then starting over is the only thing you can do.
I am using the Sixaxis app (will post the profile in another thread soon) so that may interfere, although it has not caused a problem in any other game I've used it with until Carmageddon.
I just tried with CM 10.2 (JB 4.3) and the freezing problem is still happening. Too bad, I loved this game, but luckily I downloaded the free version before buying.
Same problem here. Galaxy SII on Cyanogen Mod 10.1 RC 1. I wonder if official releases of 4.2 on other devices have the same issue.
Same issue on 10.1 RC2. From what I managed to gather this is a Cyanogenmod issue. Carma is not the only game that freezes. And it's mainly a consequence of the poor documentation provided by Samsung for all Exynos 4 devices. I'll keep an eye on the nightlies just in case we get a fix.