Interesting game mechanic and would be fun, if... IF, it weren't for the constant ad's after EVERY... SINGLE... DAMN... LEVEL!!!! My god! talk about ruining content and pulling focus from your content. I couldn't even get into it enough to want a paid version that's ad-free. I understand you need to make revenue and it's a free game, but every level? really? Not like every second or third level? I mean, come on... the levels aren't that damn long to start with!!!! Game ruined.