So I love the classroom series, but level 2 is way too hard, especially compared to level one. The later ones do a better job of ramping the difficulty.
This is and Hovercrafty are the result of a (crazed?) experiment where grapefrukt prototyped 6 games in a few weeks inspired by two words chosen from the newspaper. More about it here: http://www.grapefrukt.com/blog/
This game is hard...but when I actually get it I really enjoying swinging around the anchors. At least you don't die when you go off the edge! That would truly make this game impossible.