There's no way to avoid going negative the first time you run through the final level, but you shouldn't go negative for the second run through. The end game sequence changes based on how you do on that last attempt. There are 4 different endings.
Also, you lose when you go negative popularity, but you can't lose after level 48. I didn't want to jip people who lose on level 49.
I beat the game with a positive score my first run through. Scored a park value of something like 300,000. I did it on Normal Difficulty.
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I beat the game with a positive score my first run through. Scored a park value of something like 300,000. I did it on Normal Difficulty.