I played the game and had fun! At least until I finally got to the midpoint and then quickly died afterward. I was really hoping that big energy bolt would be a checkpoint, but alas.
So I liked the art, but I noticed that the big wheel thing in the center has bigger pixels (or just looks that way) than the surroundings. I'm guessing from being a sized up version of the others. As a pixel artist myself, it's very noticeable.
As for the controls, I found them frustratingly slippery. Especially on the three posts at the start, I'd sometimes land just on the edge and then slip off while just staying still. Super frustrating! I assume you've got a circular collision box? That'd be a downside of one... unless it's intentional. But then, it's a bit too hard for my tastes with no checkpoints.
I do like the snappy respawn time though. I also thought the trail effect behind the player was a nice touch! Overall, great job!
P.S. Although unrelated to the game, you should know that the font on your main game page is extremely low contrast with the background and thus very hard to read. I'd suggest changing that.