How do you do bloons level 42?

You have to cheat! Well I am beast at that game so I have already beat the whole game.

yes i did and then they gave me 10,000$ because i beat that level if you do that level and beat it you will be rich

First, gently push all the TNT off the edge until it's all near you. Next, clear out everything near the exit. Once that's all gone, blow up the TNT. You might need a slight boost from a bomb.

elite 4