Like others have pointed out, the fixed converters make it too easy to solve. I think changing it to having multiple sets of levels, each with their own fixed set of converters and a definite end-point would be better. That way you can’t just use the same strategy over and over but actually have to think what’s optimal per level.
Alternatively some randomness in the converters so you have to be smart about what you want to choose.
OH MY GOD YOU GOT BILLIONS! I myself never earned that much, my congratulations!
About your comment, yeah, a game have a fundamental design problems, its just like a math problem, you know everything you dont jave to make difficult choices, you can just calculate. i eas thinking about making a deck and let player draw cards every turn, but it just a whole new game and balance... So I decided to practice how to make tutorials and end this game(You probably played the older version without good new tutor and a character). But that was my first game, so next one will be better)(I hope)
Yeah, I think unintentionally doing it more like a puzzle game did work out, it just ended up not having a clear end. Good luck with your next game!
