Nice game, it reminds me of hill climb racing. I like the art and the upgrades, but I don't like inconsistent collisions as someone else mentioned earlier. It's a real show-stopper when you bump into a platform and lose all your speed while in power mode, ya know? Also, I think having certain crates drop powerups like magnets to collect the green guys would be cool as well. Other than that, it's nice. Well done!