Apparently the monkeys hate the balloons so much they're willing to 1. Bomb them. 2. Use Sniper Rifles for defense. And 3. Modify Russia's Chainguns to fire Darts at an extremely slow speed until upgraded for some reason.
Suggestion: to make the game a little more realistic, make some sort of tool that destroys the blocks that were hit by the bazooka instead of them dissappearing; so that you can cave-in tunnels and such.