Ringhold
Spin the stone rings to aim your towers and hold the keep.
About the game
Your keep stands inside rings of stone walls. Towers on the gatehouses only shoot down the road they face, so drag a ring to aim them before each wave. Merge towers to make them stronger, and watch for Hoppers that jump to the next road. Ten battles, from one ring to three.
Controls
Drag a ring to turn it. Tap a tower in the shop, then a slot.