Great artwork, I especially thought the parallax(?) backgrounds look great. Loved the geometric look on the trees.
Unfortunately I had hard time with the gameplay - the controls threw me off a little bit with UP being jump and Freeze being SPACE. I also felt like the collision shape sizes could have been tweaked for both the goblins, the ice effect, and the size of the collision of frozen enemies.
Something to explore might be pushing blocks of ice once enemies are frozen, or having a flame that can thaw out frozen enemies (this may have been in the game but I did not make it past level 3).