Great aesthetic and visuals. The implementation of the two button diversifier was really interesting, too. I would totally play a fully-featured racing game with theses controls; drifting and boosting both felt good. I appreciated the tutorial (and redirecting the player to the tutorial before starting the game); it did a really good job of helping me come to grips with the game's controls and mechanics.
I like the idea of sacrificing checkpoints for increased top speed, but I didn't like how you seemingly need it to win. It doesn't seem like its possible to catch up to the racers in front if you don't break the checkpoints, which undermines the risk-reward potential the mechanic has.
I also felt like the track was too long. There's a lot of downtime between turns and jumps that brought down the pace of the race. It also compounds with the checkpoints issue I had, because falling off means you go really far back when you break the checkpoints.