Nice Job! I like the art and music, and the pulsing light was really neat.
I really like the genre of bullet hell games (Most games I make end up being one ;p) and I have tons of suggestions about how they should be done, but to keep things brief here are a few pointers:
- The players hitbox should be really small so you can weave between bullets (and bullets are spread out to stop you from not even going near them)
- The player should be pretty slow so you don't accidentally run into bullets
- Shooting/Fighting back is often an intrusive mechanic, if there is a need for aim it can conflict with the need to dodge, unless done really well (E.g. you need to risk standing in a dangerous part of the arena to do more damage, which makes the fight go by faster)
- The most fun thing to dodge as a player, is attack patterns. If a lot of bullets come from a single source with a pattern to them, human brains are good at seeing the pattern and how to dodge them, and makes a rewarding learning experience. This also makes the player face the attacks head-on, instead of just standing on the other side of the map where there are less bullets.
Sorry if I am rambling, I really like the direction your game is going and would love to see it perfected, good work!