Neat concept with just okay execution. The art and music are super good, and the execution starts off great, but the more complicated the levels get, the more the cracks start to show. The camera, for instance, feels a little unfair and lags way behind the car. The boxes could be conceptually interesting, but they play out as more of an annoyance than a fun challenge. And, as has been noted, you can explode while turning just because the sprite made a 90 degree turn, which doesn't really feel fair.
The game is painfullyt close to being really good, it just needs some crucial polish in a feel areas that kill the fun factor.