First off, I always appreciate a game that allows full key binding including the number-pad keys (which I always use for these types of games)
However with that said, I did find the game control a bit stiff and unresponsive. Often times it felt like my inputs were being eaten or delayed, it got to the point where I felt I was fighting the controls more than the enemies and hazards.
As a small suggestion, make the attack a bit faster, and/or allow you to move forwards a little during the animation. With how much it locks you in place it feels bad to be just out of reach of the enemy you are attacking.
Now with the bad out of the way. The art and audio is really good. And full voice acting is impressive. And despite my complaints, the core gameplay concepts were really well thought out with the kill enemies to charge special uses and the jump resetting on kill.
Overall with a little more polish on the gameplay and optimisation front the game has a lot of potential and could make for a really fun game, so good job on the submission.
Just to add, the downloadable version had the godot loading screen stuck in place, I could hear the music and sound effects but not actually see the game screen. This forced me to play via browser where the performance was a bit scuffed at times (frequent micro stutters), this may have amplified the unresponsiveness of the controls; so take my prior views on control with a grain of salt. For refence this same issue has happened once before with another godot game from a different jam. I don't know if this is an issue with my system of something on your end, however I have played several other godot games just fine.