This is a fun game where there are multiple enemies that try to get to the end of the map, however you need to place towers to defeat them. Press a difficulty to start the game. Then the play button to start the wave and press the arrow on the right to open the shop. And click on the bin after accidentally buying a tower to remove it and get a refund. You will be refunded half the money if you place a tower then sell it. Press on the turret to see its range and upgrades.
I used a tutorial by Warfame but made everything myself.