This game was surprisingly fun! a few things though: making some sort of timer/ score counter to compare past scores would have been nice a long with a little screen shake. But the blood was fantastic and the attacks were really interesting and finally the last thing I would want would be some sort of health bar as the game felt rather hard and having the player able to take a couple of hits would have been nice. Other than that though the game was awesome! I really enjoyed it! 

Very cool game! 

BUT having "shift" as the button you need to press to get past the title screen is very untuitive and most people will give up.

I recommend putting a quick disclaimer in the "How does your game fit the theme?" description, explaining to press shift.

Anyway about the actual game:

It's really fun, even if it's incredibly difficult (I died about 40 times before giving up haha)! Good choice of audio and SFX. The bosses moves are all really cool, although I think the lightning shoots a little too frequently, it was basically always an insta-kill on me.

Feedback:
- I think a health bar would have gone a long way. I might have been more persistent if I knew how close I was getting to beating it.
- An in-game tutorial also would have been very helpful. I nearly gave up because I didn't know that there was a shoot button.
- The control scheme is very weird. I think this wouldn't be a huge problem (because you can re-bind them, good job!), if there was a quick tutorial image explaining the default keys for jump and shoot. (And that there is a double jump, I died a lot before accidentally discovering that haha).

Overall though, great job! I had fun playing this :)