Heya mice,
you got some really nice stuff here! Just wanted to point out some things. The wings on the enemies looks kind of jagged! I'm attaching a picture to show how to make it smoother, itīs way difficult to explain so hopefully the picture shows exactly how to do it. Maybe this added some effects you didn't want on your enemies though.

Also the upper foreground has something to it that doesnīt look quite right. The "rocks" seem to grow out of nowhere somehow. I think it would be nicer if you instead of a "cave" made a landscape and used the "frozen" setting on it that you were playing around with in one of the pictures. A vast frozen city in the background would be awesome I think!
I will try and make an edit when I get more time tomorrow and play around with it a bit. Keep up the great work, it already looks kickass and Iīm sure the game will be lotsa fun!!

Cheers,
Lelle