Bomb hotkey would be nice. The first extra bomb gives you faster effective cooldown, but the ones after that aren’t really useful. The crit upgrades also didn’t seem worth it.
Drones feel really bad at the start, but they scale well and work with active gameplay since you can tell them to hunt and peck rocks & clay for you and set up the bigger rocks. They’re hard to idle with from the start because their damage is so low, their upgrades are expensive, and it’s not feasible to mine or automate sandstone/clay/quartz until you’ve already manually bombed a lot of it. Their scaling feels on par with the player weapon because they have the same exponential damagespeedacuity upgrades (and despite the travel time I like that their attack speed upgrades are twice as fast), but they start so weak.
I like how the 1.1x scaling on both attack and defense works. Your income goes up quickly and scales great with bomb and capacity upgrades but the higher tier rock resources are slow. I alternated between purity and capacity to take out as many as I could each bomb cooldown and quartz/sandstone still felt glacial.
I don’t know what else you have planned but hope this helps! It’s looking promising so far