a very relaxing game but the music is a bit different but it suit the situation which is that you are in a cave
suggestion:
1. pls expand the map or have some way to "open your map" rather than having a minimap and have the robots be clearly display since I can't tell whether one is a digger or a gatherer and it's kinda hard to tell where are they since they blend in with the map
2. it would be useful to have a counter on how many robots you have since I already lost track of only after 4 diggers XD
3. I think this is just my computer not strong enough but I can't finish the game(aka achievement) due to it crashing from all the caves that got dig up XD
4. CONTENT: more upgrades for the gatherer like instantly picking every gem in a cave or going to the nearest gem since they appear to travel at random which is find but hard to control, a new robot like a fighter that follows digger in case a threat comes from a cave or a new building like a teleport cause the cave gets BIG the more you play
either way good job :D