There are only 2 buttons in the game: - Spawn — You produce the 1st mob, which will bring money as long as it is alive. However, you cannot create more mobs if you have reached the limit. - Improve - Improving mobs leads to a rise in the price of Spawn, but in return you get even more profit
They give money for the destruction of mobs, but who will wait for their spawn time if you can make an automated farm? That's right, nobody! So you have created a farm where mobs spawn, they die, and you make a profit. You don't even need to dirty your hands, you just need to spawn mobs, relax and watch the automated process.