Interesting, and looks really nice. Though has been mentioned by Roh, there's lots of half-pixels so it's technically not 64x64. It would look a fair bit different if it was true 64x64 as you wouldn't have such smooth animation, such as the variable speed falling snow... So I do think this should be counted against it.
But otherwise, it is a pretty cool game. Would be good if there was more to actively do in it.