I guess this game is a little unfinished?
The graphics seem nice, but even at the lowest quality and resolution it was still lagging on my computer.
I couldn't find any was to refill my oxygen, but I guess it didn't really matter. Even with my health completely drained I still kept going.
This was at least a nice attempt. What's there seems like a good start, just maybe dial back the scope a bit next time.

Gave it a try, it animated smoothly though I kept getting stuck on the edges of walls, and when trying to jump uphill I would end up leaping backwards?

Seems like it would be an interesting puzzel/explore game with a little more development.