Thanks for playing! I just realized that I uploaded a debug version, so you got placed in the middle of the end content. There's a tutorial, but I appreciate you powering through. If you had fun and want to play more, the proper demo I just uploaded has three more boss fights.
I'll definitely add knock back for the enemies.
Watching you fail the captcha until you selected the mirror reflection made me laugh, I hope it was a good joke on your end.