One thing I find funny: when I am down to nothing but traps and bastions, the enemy will stand there shooting, and then just drop dead with full health. WTF???
This game, along with company of myself and coma, should be put in a "makes you think" category. These games always make me question, "what was I really doing?"
Coin farming: Find an area with cuttable bushes near a screen change. Whack the bushes and collect coins, then shift screens and return. I managed to buy both frost sword and flame armor almost immediately in the game.