Bloons Tower Defense 4 or BTD 4 is the fourth installment of the BTD game series. It features more upgrades and new tower types.
To start the game, you first need to select a track and a game mode. Then start the game!
In this part, your goal remains the same. It's to pop all balloons and stop them from escaping. The balloons will still fly in a maze. You have to place different items tactically in the maze to shoot the balloons.
As you advance through the game, you will unlock more items. Each one features special attacks that can help you defend your tower. And each one has its optimal placement. You should read the tooltips on the screen and decide its best location.
At the beginning of the game, don't worry to much about placing things at the right place. It takes some time to learn how things work before you can come up with a strategy.