Really enjoying the game so far. The only issue I've had is that the E brake engages immediately after the hardest brake level. There's no buffer between normal brakes and the E brake even though the tutorial graphics seem to indicate one.
So if your Playdate is like mine and the crank calibration is off by a few degrees (which at least somewhat common) it means you're going to have to restart a few runs because the device thinks the crank is behind the device.
Otherwise the game is really great. Impressive work.