Hey thanks so much for playing and giving feedback! And such specific feedback at that! Very helpful!
Did you play through all 3 worlds by yourself!? That is quite impressive!
I will turn the eyeball death sound down and maybe add a small pause when world1 boss changes direction (he changes randomly).
I can't take credit for the music, but I can point you to the guy that made it.
https://soundcloud.com/modem/tracks
Thanks again for the comment and for giving my humble game a go, it really helps me make it better. :)