1. On desktop, the mining equipment is hidden by the achievements. Switch them.
2. Clicking upgrades are way too weak for their price. Maybe more of such upgrades to keep up with mining equipment?
3. By sector 2 there is no indication anymore of how much is needed for the next stardust.
I'm at sector 2, I've enough to get +2 stardust but no real incentive to do it... bonus is flimsy, I would have to click again... Growth is too linear so far.
So I guess balance first before thinking of more features.