Ok, so the first level up is 100 clicks and the next is 200 and the one after that is 600. This would be fine if the output was at least keeping up with what is needed to level up. But it isn't anywhere near doing that.
The cost to level up your output is growing exponentially faster than the output. Right now I'm needed 2400 and without clicking myself I'm making 4.
So it doubled, tripled, and then quadrupled. So if my guess is right the next level up cost will be six times 2400 or 14,400 while making over 5. This means without me clicking I will have to wait an ever-increasing amount without actually having to do anything. This needs to get fixed or nobody will want to play this.
Nobody will want to play a game when it takes minutes or hours to level up once at least with a game as basic as this one seems to be.