Gameplay feels really solid, and I love having meta progression in endless-type games, it makes each run feel more rewarding and pushes me to aim for a higher score. That said, some hit feedback for both the player and enemies would really enhance the experience. A simple red tint on the player when taking damage would help indicate hits, and having enemies flash red or play a hurt sound effect would make it clear that my attacks are landing. Overall, this is a great foundation to build on, just needs a few tweaks here and there. Congrats on your first jam entry!