Love the concept of "editing" the level to help the car reach the end!
I found myself struggling to find the right piece when i needed it though, maybe a "slow down time" button would help? or some sort of way to keep an item in a "pocket" to use it in a future situation, like in tetris!
Found a small bug as well, if you pause before the starting countdown ends you can start while the countdown is still going.
Really wish there were more levels too, this could really go crazy with some sort of high speed loopty-loop car parkour :D