Very clean and minimalistic art style and it looks good. Sounds are good too. Overall very simple yet interesting game.
One issue I have is my finger hurts from rapidly spamming shoot button :)
I chose that art style to focus on programming since making the player look at the mouse and shooting bullets according to the direction needed more math than I thought.
And RIP your finger ㅠㅠ
My finger is not that bad :)