Wish you could get troops faster, instead of having to drag them one by one because later in the game when you're rich you want to have as many amazing troops as possible backing you up
Banana farms are really good money near the beginning and middle of the game, but by the time you get to wave 80 or so you should really have the monkey village upgrade that gives 150% cash per drop because 5 maxed farms will give 15000 a round but just one of those in the right spot could increase your earnings by 50,000 to 100,000, all depends on what round you're on
I have a different way of how i got the hard badge: I did the song letting go (of course) the notes i don't think matter, i did abstract though if you were wondering, I did radar and fixed, no random. I got 6 million points and only hit 68% of notes. Basically all you do is stay near the middle where they don't spawn and run out and get yellows and purples, it's really easy to dodge the reds. I tried to do the in and out way for a few tries, but i only got 4 million my best try, so maybe this will work for those pople struggling for the hard badge. Good luck and have fun playing this amazing game :D!
 "Legend of the Void 2")
 "Infectonator 2")
 "Epic Battle Fantasy 3")
 "Feudalism II")
 "Bloons TD 5")
 "Kingdoms CCG"){kind=icon}
 "Music Catch 2")
 "You are a... The Sequel")
 "Straw Hat Samurai")
 "Sprout"){kind=icon}
 "Kamikaze Pigs")
 "Innkeeper")
 "Haunt the House")
 "Nuclear Outrun")
 "Hack Slash Crawl")
 "Edmus")
 "Bloons Tower Defense 4")
i think, that guy is a cheater. *YOU DON'T SAY!*