Fun time! It felt good to hit the enemies, and there was a good amount of challenge to fighting them. The basic upgrades are a nice touch, would have loved to see more abilities.
My biggest feedback for the game would be the camera. Everytime you move and stop or change directions, the camera moves way too much and it can be incredibly jarring. It made me kinda dizzy at some points. I realize not everyone will have a problem with this issue. Personally, if the camera was at a fixed angle where you could see the entire arena, it would eliminate that problem completely. (Though I understand that off-screen enemies can keep the game challenging.)
I made a video with my commentary and experiences. Keep up the great work!