Hover your cursor over the brown tab on the right and click a tower to buy it. The tower will follow your cursor. Click anywhere to place your tower. Click a placed tower and then move your cursor to the brown tab on the right and click "Upgrade" to upgrade your tower. Hover over the "Upgrade' button to see the cost. If you want to see the stats of your current tower and the stats of the upgraded version before upgrading your tower then click your tower and then hover your mouse over the brown bar at the top of your screen to see all the stats. Click the "Play" key on the brown tab to start each wave. Also, you can sell your building for money. Hover over the "Sell" button to see how much money you will get. Have fun!
You guys for playing this.
