This is pretty neat! Love the huge range of movement techniques and the choice of weapon.
I believe most reviewers below have already made really good points regarding areas of improvement, so aside from those, here's some of mine:
- Wish there are checkpoints, or at least level is broken down into smaller stages. I believe there are secrets in the game, but it is deterring me from finding them since dying will take me all the way back.
- Kinda weird that this game uses WASD+mouse controls, considering that mouse movement is not really needed. Mixing with comments that mentioned to have a "look down" action, I think maybe you could try implementing camera panning with mouse movement to fully utilize mouse usage.
- On the topic of using mouse, I find myself scrolling the mousewheel to change weapon. I think it would be nice to have that as well instead of pressing 1/2, especially for the boss fight where I need to have my left hand on WASD at all times.
Great job! Thanks for making this!