Alpha 0.1: added player and enemy. Alpha 0.2: added kills and new enemy types. Alpha 0.3: added coins. Alpha 0.4: nerfed the standard weapon. no health yet for the player. Alpha 0.5: added new zombie and player sprites from @attackontitanfan9 Beta 0.1: added title screen and thumbnail.
Credit: @attackontitanfan9 for player and zombies (I modified them a bit if you don't mind)
