Idle TD is a single-tap hyper casual tower defense game that will keep you hooked for hours! Upgrade your defense cannons by merging them! Watch as your cannons level up and become powerful defenders, and get exciting new powers to crush bosses and attackers! Once you've set up your defenses, you can sit back, relax and enjoy your day, knowing that your cannons are working hard to defend your land, but remember to check back often for upgrades, gifts and other rewards!