This was a really neat game! The puzzle interaction between the 2D world and the 3D world was simple, but well designed. The two music tracks for both worlds fits really well for their respective worlds. The 3D world character kinda freaked me out at first but it's rather charming after a bit, haha.
I think the controls could be improved a little. One button (instead of two) to restart the level away from the other keys for jump and dash would be really nice, as I ended up accidently restarting the level just as I was about to complete it. There's also a bug in the 2D world where the character will get stuck in the ground if trying to jump and dash at the same time, forcing the player to restart the level. The 3D camera angles and lightning need some fixing as well.
Otherwise, it's a really short and simple puzzle game! I enjoyed my time with it! I also happen to make a video with my experiences! Keep up the great work!