Not funny.
I don't get it. This series must be the Kenny Bania of Flash cartoons, but worse; it's not just humor you don't have to think about, it's humor that doesn't even work unless you completely shut off your brain! At least the first one had SOME subtlety--in this one, Charlie outright explains every "freakin'" joke. Pro tip: Humor this obvious needs no explanation.
I did like the "time travel" effect, and the song was well produced (but not really memorable), so it wasn't a total waste. I guess. Since this is Newgrounds, you probably also deserve some credit for not taking the completely obvious route of completing the snowman with Charlie's penis.