Some things I will suggest without playing through all of it:
- Having a dropdown instead of a slider. Could imagine the slider might get somewhat annoying with more elements.
- Allowing the player to see the total resource change over time, given that we can already see them for individual machines.
- Giving more space for the player to draw to make errors.
- Speeding up early game a bit- it seems to be quite slow and without new development.
- Really wishing this game would have delta-time calculations as well.