MetroCUBEvania

My first PICO-8 game !
It's a tiny "metroidvania" platformer where you play as a cube.
You gain more and more abilities as you progress.
There are multiple environments, some collectables and you can find a boss fight at the end.
The controls are :
Z/X/C/V - Jump
Left/Right - Move
Down - ???
If you run into a bug please report it so I can try and fix it.
Feedback is also appreciated :)
I hope you enjoy the game !