Very fun concept! Reminds me a bit of Bad Piggies. At first I was confused as to why I was so slow, then when I crashed myself on purpose I discovered how you can add upgrades. This is a cool idea, but also made me cheese the game. You can just crash yourself multiple times on purpose to instantly win the game in one go. Reading the comments, Profour has a very nice suggestion to this issue.
I loved the pixel art and the music suits the game very well!