I have some ideas for new upgrades whenever you release an update pertaining to them.
1. Bouncy-poop starts making money per bounce (Probably Max of $10 or something for balancing)
2. Increase timer limit
3. Generic "add 10% profit to everything" (probably the most broken upgrade)
4. Rocket-poop and bouncy-poop can collect bomb-poop
5. (This one is probably more difficult to implement) Ascension upgrades
I hope you take at least one of these suggestions to implement!