Slow to get going, but once the chain reactions start popping off its extremely satisfying. I had no performance issues the whole way through on my very weak device, so it seems well optimized! I would want to see the potential for even longer reaction chains, maybe make the purple core more accurate (I swear whenever I see a chain reaction end its always a purple projectile baaarely missing a chainable core), and of course continue with the story, but honestly if this was a demo I would buy the full version!