Thanks! I had a great time making the art for this as I had a lot of fun using such a limited palette.
I really wish I could have made the early levels harder, but I thought that it was more important to introduce mechanics in a way that was simple and easy to understand in order to enable me to put the player into harder longer levels. Speaking of the later levels, if you found them a bit long, that's a preference I completely understand and I hope you didn't get too annoyed by it. Personally, I prefer the longer levels.
About the movement: you don't actually have to wait the entirety of the animation, I think you can cancel it about halfway through. That being said, I realized that maybe others aren't as in-tune with the controls as me, as I sort of get into a rhythm since I'm so used the controls. There's a lot more going on with the movement than just the movement which meant I wasn't able to speed it up as much as I would have liked. I'm planning to update the game after the jam, and I will likely optimize and improve some details like that.
Thanks for playing!