I'm very torn about that one. I think your art and the controller are very nice, but I'm very torned about the mechanic where you need to slow down before a checkpoint. Racing games should be about going faster ans faster, but this feels like you're making me do something that's againts the natural flow of the game.
Also, random obstacles just showing up out of no where it never fun, at least give me a heads up.
But yeah, for the rest, controls is good, music and sfx fits, art is nice. Tutorial voice is a little much, but it's fine.
Good job!