Right-click game to play full-screen (if available)
Use W,A,S,D or arrow keys to move your character around the map. Click on the wrench button in the blue menu bar to access the tower build menu. Select a tower, then select a tile on the map. It must be close to your character. Click on the base of a tower (the center of the tile it was built on) to see a dialog with information about a specific tower. You can also sell a tower from this dialog. After a while, towers can be upgraded. An upgradable tower has a small flashing arrow at the bottom right.
