This game is amazing! I love the visuals, the audio, the gameplay, the writing, literally everything, great job! The only nitpicks I have are:
1- It could be a good idea to swap the places of the character sprites and the line where the enemy sends spam could be swapped so you can see how you're doing while still focused on the arrows at the bottom
2- The game is a little bit too easy, it could be cool to have an optional challenge enemy that's really fast as a fun test of skill