What I liked the most were the abilities. The way how you can use frost projectile as a platform to get further is great. As a platformer, it was fine. The controls of the character felt somehow a little bit off, but not in a frustrating way.
It is nice that you implemented shop upgrades in between levels - it makes you more motivated to collect coins on the way.
What I missed a little bit is the theme integration. I assume you are running in a tower, but I feel like it doesn't play a role in the game - it could be a castle or dungeon as well.
Overall I enjoyed the playthrough.