Heat function again (because nobody answered last time)

Your goal is to make the best game with a heat function and once your done making it share the URL to here. (STORY) It's about a guy who forgot to where his coat on a winter day. (GAMEPLAY) 2D platformer where if you stay out of a shelter for 10 secs you die and restart the lvl with shelters to give the player some heat so he can go back out and try not to freeze. That's all you need to know before you make something incredible and I try it out and declare the winner!