Thanks for playing!
Good feedback about the last level, and I’ll take that into account. In my head, the logic behind it is that you need to make a continuous wall between the windows and the exit so that the cold air can’t get anywhere near the door. The trolleys need to be placed so as not to leave any gaps (including diagonal ones) which would allow cold to leak through. Placing the mobile heater near the exit is tempting, but it means that you can’t block the right window so the effect kind of cancels out.
I think more specific instructions for all the levels would help, perhaps.
Glad you enjoyed the artwork and the game.