Another of my Zoom class distraction games. Surprisingly deep, and on hard it's actually hard. There's a variety of viable strategies, upgrade trees and niche mechanics.

It becomes a game of sense and instinct. Feeling for where your defense is failing and patching it up in a synergistic way. One lower difficulty you can play the game mostly tabbed out and on autoplay, just popping in to place towers every few rounds. Bloons TD6 is fun, and relaxing--but that's about it.