Very nice one-screen platformer design, I like the use of wrapping around the vertical ends of the screen. Sound effects were very pleasant. The main thing I dislike is the umbrella attack, I understand it only has a hitbox when it opens but the timing feels extremely tight and it strikes at an awkward angle; I feel the hitbox should linger for a bit. Also the bullets shot by the boss are extremely unthreatening since they fizzle out before they can reach you, and there's a lot of doing nothing while you just wait for the boss to come close enough to be hit.