Click to select towers and click again to place them.
SHIFT: place multiple towers of the same type
Spacebar: send in bloon rounds and toggle fast forward
Hotkeys: tower mouseovers tell you which hotkeys select which towers
Green disk: shows whether your most recent progress has been saved; green=all good, orange=trying to save but has not yet been saved so if it doesn’t update to green soon you should refresh, red=connection lost so refresh.
Updates – clear your cache if you aren’t seeing an update (ie. a new track).
Bloons Tower Defense is back and better than ever with improved graphics, loads of new and original tower types and tons of upgrades for each tower type! Heaps of tracks, save games, career mode, sandbox mode and apopalypse mode. Bloons Tower Defense 4 will give you almost unlimited replay value. Select the track you want then the difficulty. Buy your towers from the side bar on the right and place them around the track in such a way as to maximize their effectiveness. You will unlock new tower types with every rank you go up.