Fun little game, fast paced which was really nice and the element of having to switch to kill certain enemies was great for sure!
Would have needed some kind of indicator (maybe a sprite color change or sfx or something) to let you know that you're getting hurt. I didn't realise I was getting hit, before I saw accidently my health on the bottom of the screen and I had like 10 health left :D
But overall great little game for sure and had fun playing it!