I played through Thin Ice today with the intention of the perfect run. It was going well up until level 18. I simply was not paying attention to my health meter, and it cost me. I ended up dying because of my own stupidity. However, I tried again and bear 18, 19, and 20 with little trouble. The thing is, I know I can do the perfect run for this game without much trouble at all, but I made a vow to only play each Nitrome Winter game once a year (from December 1-24), so I will have to wait until next year to try again. Anyway, I think I'm #62 or something on the high score board.
Oh well, I still have a chance to do the perfect for Frost Bite 2. That would be a dream.