Although some of the comments DO have merit to them, overall I thought the grind involved in this game was (for the most part) appropriate. In the early stages it can be monotonous, but if the upgrades were too easy to reach, there would be people complaining about that. Because the upgrades "take too long" in this game, people are complaining. There will be complaints regardless of how long it takes to attain the upgrades. One you reach the early-middle part of this game, the grind appears to be pertinent.
 "Bloons Super Monkey 2"){kind=icon}