Well done. The glitchy controls with the infinite jumping and glitching downwards are quite a cool mechanic and it's quite fun to maneuver around the level. I agree that checkpoints would have been a great feature as your level (or levels?) is really huge and it feels a bit frustrating to always start from the very beginning.
I explored the out of bounds space of the level a bit and it seems like there was nothing to find there. Some giant arrows where pointing towards a platform but I wasn't able to interact with that. There are probably some really cool ideas in this game. From the outside I saw some cards that apparently help you to change the rules of the game but unfortunately I didn't manage to reach them.
The lack of checkpoints really seems to hurt this game quite a bit but overall still really well done. Nice submission. :)