This is a solid entry, the music is fits the artstyle well. I like that there is a red vinginette on the screen, when the player is low on hp. I only had issues reading the score, because it quickly goes over the border of the screenThe other problems are already mentioned by other players, like the enemies being a bit to fast (or to hard to hit). Some invincibilty frames would be great aswell, because multiple enemys can hit you at once.
Nonetheless I has fun playing, My highscorescore was 520.