Obviously this is good, and I don't want to post a list of nitpicks. The biggest problem I can come up with is that it's kind of hard to judge the range of your attacks (and your enemy's attacks)... and figuring out whether you can reach a guy or not with your melee blast and whether they can reach you is kind of the whole game.
For example, if the snowmen could only attack in straight lines or something that would make the game a lot more predictable.
Also, tell whoever made the music that I love the music! 🙂👍