Hello. I like the sound effects, but maybe you could also had some screen shake? I also like the "tutorial", but maybe you could use a font that is not Arial? Also, music always adds to the experience, so I'd add some music. The game is too short and too easy, since you have so much HP. I think the player should only have 3 HP, but that might be just me, since I play bullet-hell games. I do have a question tho: How does this fits the theme?