Recently I've been testing a route that helps with the final boss. Before there wasn't really a route at all that I used, I just freestyled the upgrades. Here's an overview of the route: Try to get at least $25 getting to the third upgrade screen to upgrade punching to 2. Play the game as normal until you get the resourceful badge. Once you do this, upgrade punching to 3 and swinging to 2. Play the game normally except without upgrading until Emerald Temple. Once you get there, break the vases that contain money. Your goal is to get $280 to buy punching 4.