Glad you liked my take on the theme! It wasn't until a few days in until it clicked for me that "freeze" was probably picked as the theme because it was supposed to be winter-themed, but by that point, I was already far enough in that I decided to just roll with it.
And yeah, being able to move around after clearing a level is actually intentional. I just thought it would be kind of unsatisfying if the level froze after you beat it (I also made it so that obstacle collisions are disabled after you win so you can go back and run through them without consequences if you want).