Very thematic. Good implementation of the jam focus.

I really liked the large enemy that pounds the ground. Even though that effect is annoying (and maybe lasts too long), it forces the player to dodge and move quickly.

The main character looks pretty good, but the animations are very stiff. 

I didn't get any audio when I played this. It's always good to put some music and SFX in there, even if you don't spend too much time on it.

This is a good start to a game. I like the level design.

The ground shaking thing was a little awkward and it does need some sound, but I understand its a prototype. 

This was a fun take on the theme! The slippery controls took a bit to get used to, but I get why you made that decision since it is an ice world. One thing I'd like is the ability to replay when I die instead of having to refresh the page.