This game shouldn't be made multiplayer it's better singleplayer being multiplayer would change the game dynamic in a bad way i think. I agree with the idea of just improving this one instead of making a new one, idk if you are already in the process of a new one or not though.
Ok so as many have said, the limited gold level is practically impossible because of the AI insta-spawning and them having completely unlimited gold. The game was fun until i got to that.
:O i just got to "passing gas" which i think is uranus or something, then i came back down and did i belly flop but i still went all the way to the bottom of the ocean