In the game's present state, its virtually unplayable. It lags, freezes, then crashes my computer. Not only that, but in the short time the game does work, many of the medals don't, the character gets stuck in the walls mid-jump, and the leveling up system seems to be broken. Speaking to others who've played this game, it seems I'm not the only one this is happening to either.
It's a shame really, because the game had potential to be fun.
Based on the fact that the game is extremely flawed, and doesn't seem to work right, I can only give a half star. I really hate doing that, but it's the only option as of now. If/when the game is fixed and works without killing my computer, I'd be more than willing to give it a 3.5/4 star review, because it is kinda neat, and there is fun to be had.
Please see what you can do to fix these issues, and you'd have something really good here.