Finally beat level B5, I have no idea how I managed to figure it out. Really nice game with a simple style but complex and difficult puzzles. The abstract style allows for difficult puzzles which are still possible to solve. It would be great if there were Kongregate badges though.
Beat all of the bosses from the troll to the giant bird thing using a metal suit, 5 red under suits, and 3 sparrow droids. Seriously, the collision damage droids are overpowered when combined with high health + regen.
My personal opinions:
-the yeti is too weak
-the wisp is too strong
-there needs to be some source of late-game wind defense
-it is possible to use 3 magic pickaxes to avoid the yeti/giant spider
-the town square after you beat the game should have a lot of people
-artifacts which are stored in the museum should have a lower drop rate
Despite these things, I think this game is extremely fun and well made.