Well first thing First, you have to go to roblox and search' TDS ' or ' tower defense simulator.

You will probably see there is many people and you will see that you only have a scout and a sniper guy.

you might be wondering why you have only these not those its because you just started playing this game.

You have to walk around and look up. If you see a sign board called 'survival' so that you can choose a map and play it. When you in the game you have to place your towers but you have to wait for the money to transfer to you.