Nice game!! Fun gameplay. It was hard but once I learned the attack patterns of the enemies it became a lot easier, also getting more max health helped. Agree with Liam on the level design. Would also like to throw in that different enemy design would be cool too, I found that I usually just run around in a big circle around the walls for every level and it worked. Anything to break that up would be interesting (haven't beaten it yet so there may already be something like that in there).
But the gameplay loop is there and it's good! Good luck on it in the future!