Hah! Abominable finale fer sure. (Re-starting the browser got me un-stuck.)
Timing seemed tricky getting past a couple of the rotating lasers - the one to get the final snowman/bridge, and then the final 3. Surprised you could get it that close with an HTML5 game.
Difficulty seemed "about right" to me - easy enough that I didn't give up. Which means it is probably way too easy to be entertaining for any (ahem) less senior visitors.
[later] After finish I was accidentally "hiding" under some blocks in the center. Didn't realize the snowrisu would crush me when I came "out"!