I had some troubles with dodging snowballs while repairing and going down the ladder when I was already at the top. It also would have been nice to have replay button when I died so I didn't have to refresh the page.
I loved the concept of the repairman going around repairing furnaces! Aside from the small issues mentioned above, this was really fun and I could see the game being a lot better with the attack issue fixed. Well done!