It's really cool, I love the animations they look very well done and the art style works well for this type of game. I noticed that the bonus points sometimes spawned inside a platform making them unreachable and it the game feel slightly less good. When I tried to speed up or slow down it didn't always feel like I was, unless you can't slow down beyond your starting speed as I tried slowing down a lot more than speeding up. The fireball hitboxes were also a little weird, it seems they stick out the top a little bit more than the sprite shows and that caught me on a couple of occasions. However, they are all more minor bugs. It's a really good game and I like the addition of the double jump it definitely helps dodging the fireballs.