Don't mind the TD 3 logo its TD 6. =( The menu on the right is the tower menu. where all towers are located. Select one if you can afford it and place it anywhere on the map. After placing it, you are able to click it to open its upgrade menu. Upgrades are used to maximize your tower's power, each path with its own unique gimmick! When upgrading past tier 2, other paths will be unable to upgrade past tier 2, and when cross-pathing, only 2 paths can be crossed and the other will be restricted. That's how Bloons works.
If you liked it it was heavily impacted by TheDipler so check his out! #BloonsTD 6 #BloonsTD 3 #BloonsTD #TowerDefense