That seemed to be my problem. Thank you!
Something in your code is making the population decline far too fast. I clicked like crazy to get the $500 food upgrade and it still wasn't enough to slow the rate to get another upgrade.
Very fun game! My biggest complainant is making the upgrade amount easier to read (lots of zeroes).
I can't play at all without a game over in less than a minute. Needs a restart on the game over screen.
This is more of a "getting over it" game than incremental. The section with the dash is too unforgiving to try to climb back up.
Edit: Finished the game. The house, mine, and windmill were pointless, since the door was 200.