Arrow keys to move around, S key to sprint, and you use AWDS Keys for pointing your gun at the boss. The objective is explained in game. WARNING: This game has a lot of clip areas, such as the house, the castle, and the table inside the house. Be careful not to touch those except by the doors, or you might get stuck. Also, when you spawn in the Overworld you might get trapped in the house. If this happens then restart.
Collaboration with @artu321 Sadly, we cannot recall all of where our sprites came from, though the house and inside house are from Pokemon. We just don't want to take credit for these sprites.
