Making a archer game where your the gatekeeper on the road to the castle grounds and you must shoot the enemy's that come past with your bow n' arrow! Your hiding place in a tree. You get to upgrade 1 thing at the start, add more cover to where your shooting or unlock a new area to shoot in. The only way to gain upgrades to your shooting place is to shoot in that place, to unlock a new area in your treehouse you can shoot at any area to unlock upgrades (upgrade your area or unlock a new area.

You can also upgrade your bow and your arrows.