It's ok, but there are some glaring things that seem like they should be modified:
- the long delay between pressing space and firing might have been an intentional design choice, but I can pretty much guarantee that most gamers would hate it and want to have their character feel responsive and easily controlled, with the challenge coming from tough enemies instead of tough controls
- jumping height on non-bouncy platforms is bouncy? maybe it was because I hit a spring earlier and a variable didn't get cleared to say I'm not on a spring any more now?
- falling is fast and camera tracking is slow so you can literally fall off the bottom of the camera view while still being in play
- it seems like you can control the character by mousing over the control symbols, and yet the mouse is hidden?
- springs don't work correctly if you jump up and land on the spring