Missions by Abcdefghijklmnp

Missions
Cash starve: All non-red Bloons from round 1-41 are reduced by 1 level, difficulty Medium. Mission ends round 62.

Surpirse ZOMG: All Bloons are duplicated, banana farms and per round income are doubled, difficulty Medium+effects. At round 41 all these effects are halted, and somewhere between round 41 and 50 a random ZOMG spawns. Mission ends round 50.

Choose wisely: You can only bring one type of tower to battle, and the quota is 16 towers. No agents or road items can be used, difficulty Medium. Mission ends round 62.

Yes, sir: All monkeys will aim at your pointer if it is in range, difficulty Medium. Mission ends round 62.

Noah's ark: Only two of each tower can be placed. "Agents" counts as a tower type, and road items also total two uses.

Fool's Impoppable: Difficulty Easy. Lower your health to 1 by round 40. Failure to do this results in an immediate defeat. Survive rounds 41-42 to complete the mission.

Acknowledgements
If you haven't already realised the first two are from BMC Mobile MvM attack strategies and I modified them a bit. The rest are original. You can report any OP-ness or comment strategies below.