Early game is interesting and challenging, late game is incredibly monotonous and boring. Microtransactions are a must in order to perform well in the Martian games or beat some of the harder impoppable levels, either that or you have to get lucky with wish orbs, the rng element doesn't help. After finishing the campaign characters are not even max level, getting them to max takes tons of grinding. Not a good game compared to the other Bloons releases.