Thank you for the in depth feedback!
It was fun making the art for the game and even animating small elements like the menus and UI, I don't know why it wouldn't load a first time so that's a mystery for us too. It would fit well as a rythm game but since the jam is limited we could only do so much before going too overtime! However that could be a future consideration.
The enemy speed and iteration as well as the easy difficulty has been a common point stated so perhaps that shall be where we iterate first in another version. Also, 259 is a highscore but another pal scored 1010! The highest score as of now and said it was rather easy.
Thanks for the feedback and I appreciate the enjoyment of the game and art as it was heavily inspired by 'Invader Zim' and other more cartoony elements!