how about the ability to throw your sword/hammer at enemies? this would be really convenient if you dont have (or want) a bow yet. To make it more balanced after you have thrown your weapon you wont be able to use it until you pick it back up again? (and if you throw it into lava maybe you will have to buy the first upgrade for it again?). Also it would make the fire hammer upgrades more useful since i dont really notice any difference between smashing an enemy to bits with or without fire :P