Enjoyed this quite a bit. The level design and progression is very good. Cool looking art and music. I played through the whole game.
My only complaints (And this isnt actually effecting my score at all) is the controlls, would be a lot better with a controller. I dont think you can change the keyboard layout at all tbh. Just feels like a controller game. Would have been a bit better if there was more speed boosts. It never really got a point where I had more than 1 or 2 and was usually waiting for them to spawn. Would have made for a bit better pacing, and I dont think it would hurt your dificuilty level which was spot on too.