Cute character, like the Ice Climbers but somehow cuter! Nice mood setting between the desolate music and wind VFX+SFX.
Solid interpretation of the limitation. I like the gameplay loop, but there are a couple small things that I'm not sure enhance it. One is getting snagged on colliders, I think from tree stumps after they got chopped. The other was I felt like sometimes the hypothermia telegraphing wasn't in sync with the player health, and I would instantly die after I'd been by the cart for a while, but it's possible I misunderstood.
Pretty cool that you got Unreal running in the browser. Nice job overall and it's always nice to see teamwork chemistry.