The aesthetic and artstyle is nice, but the platforming itself does not feel good due to these reasons:
1. You have almost no air friction. This makes the player character feel kinda like a brick you're just throwing around.
2. You cannot control your jump height. A small tap on the spacebar will send you the same height as a long hold.
Overall the game gets a 3/10 for me. A platformer without good platforming isn't fun. After I looked into it this game is pretty new and the dev's first game, so hopefully they'll improve this game or their next one.
EDIT: After a recent update the game has been improved. The jumping still feels a little off (it's really hard to do a small jump), but the air friction feels way better. The level factory is very well designed and I wanted to keep playing after the game was done. Overall I'd bump it up to a 7/10