This is really fun! Having the only input be switching lanes makes it approachable, and the combination of limited resources and varying enemy speeds makes it engaging and remain so for a long time. I think you've captured the essence of what makes a game fun, and with the smallest amount of resources at that. Great job! ♥
I was slightly confused at first because I misinterpreted "frozen enemies" as a type of enemy that was visibly encased in ice, and it took me a few tries of not being sure why sometimes I couldn't kill the "other" enemies to understand—though this could be a side effect of playing many games from this jam, which feature that kind of visual.