Monkey Fortress

The Monkey Fort is a tower that you can ONLY place on the track. That means, each time a bloon touches it, it loses 1 HP. It makes up for that by having 100 HP. It acts like a wall to bloons, but also deploys swordsmen  swordsmonkey at a rate of 1 per 0.5 second. Each swordsmonkey has a sword that can deal 10 HP damage (dmg), before retrating back to base. They run towards the start, at about the speed of a green bloon. The cost on medium is 1000$.

Upgrades
Path 1:

Sharper swords: Each swordsmonkey can deal 25 dmg now. Cost: 600$

Deadly Sharp Swords: Swords can now deal a whopping 50 dmg! Cost: 1300$

Elite Horsemonkeys: The swordsmonkeys are replaced by horsemonkeys. Horsemonkeys are as fast as a pink bloon, and a horsemonkey's lance can deal 60 dmg! Also, rate is increased to 0.45 second spawn rate. Cost: $5000

Battering Ram: Every 25 Horsemonkeys, a Giant battering Battering ram is released. It COMPLETELY DESTROYS non-MOAB class bloons by running over them, and when it encounters a MOAB-class bloon, it rams it, doing an Amazing 600 damage to it! It's as slow as a red bloon. Cost: 65700.

Path 2:

Defence Archers: Put 2 Archers on the towers that fire at the rate of an bionic boomer. They shoot arrows to protect the monkey fort, so they have an REALLY short range (50 pxl). Cost: 750$

Great wall of Monkeys: Adds a big wall onto the fort, making its health a Great 150! Cost: 1200$

Super Support: The Constructions workers are working hard. If the fort gets damaged, they'll repair it at a rate of 2 hp per second. Cost: 3500$

Reinforcements: Monkey Reinforcements ability: Calls 50 Swordmonkeys and gives each tower 5 extra health. Recharge rate: Very slow. Cost: 10000$