The controls are extremely finicky, which is unfortunate because the idea is there and there's the start of some good gameplay.
Just some general comments from my experience:
- The same as some of the other commenters here - the controls didn't behave as I anticipated
- Gravity is significant and jumps are short - the trouble with the perspective is that it's really hard to judge when to start the jump and I found myself getting frustrated with the game more than my own ability
- The death sound is pretty repetitive - having a way to retry by hitting a key instead of a GUI button would have been nice too.
Overall, a good start that just needs a bit of cleanup on the controls front!