The sound effects are very cool! Very fun game! The generation of enemies is maybe too random, my first game was very hard, I had very often aggressive enemies while during my second, I had almost only passive enemies, which allowed me to exceed 100 points very very easily. Good job!
It took me a while to figure out how to get ice, but otherwise it's a really cool game! It just needs a timer or a scoring system to see if you're improving over the course of the games. Also, as someone already said, the difficulty suddenly becomes high, it should be more gradual, I think.
The design is so cool! The game is harder than it looks, I can't hold on for very long ^^ The rendering is very clean! Maybe my opinion is biased because I was there on Twitch, lol!
