This game is almost an exact ripoff from the mobile phone version Drag Racing that you can get for free on the Android Market. The only difference is that your game sucks major ballsack.
Pretty much just gonna quote exactly what NeilSenna said. "Liked it, but it seemed short, especially with no incentive to replay old levels." No replay value to be had. 3/5 just for that, but if that were fixed, through upgrades or whatnot, I'd give this a solid 4.5/5.
I wish the in-game medals were actually helpful. There isn't really a point to them. A reward system for earning them would be nice. Kinda like Elona Shooter.
While the Achievements are nice, there's really no point in having them as they don't give you anything for attaining them. A reward system would be nice.
I've got two huge issues with this game. First, the mouse mashing (which everyone has mentioned so I won't go further), second would be the fact that when I mute the stupid music, it only lasts until the end of the round. It's so annoying to have to continually mute the game after every round. Especially if you're having to grind some rounds for the extra cash. 2/5 for a bland, poorly made game.