Really satisfying! I loved the dual purpose mouse controls, having to move and shoot at the same time! I wasn't too sure what the difference between the blue and yellow enemies were. Maybe just to mix up the timing of shots?
I really don't have much to critique! The artwork fits really well, the game feel and polish was spot on, and being able to pierce enemies was really fun. The difficulty curve also felt just right for me. Really great job! Would love to see more levels in the future!