For those struggling to kill guardians, do NOT upgrade your cleric and warrior. Only upgrade your archer. The guardians get stronger if you upgrade the cleric and warrior. Archer alone should be able to beat all guardians (provided that you have enough Dark Mana).
Bug report: Sometimes my game 'stoppes' when gathering a chest. It just makes my units stop moving and I have to refresh. Also sometimes it 'pauses' (as if you're looking at your team's stats) and it won't unpause.
Tip on bonuses: Dont get 2x the same bonus, I tried for production and it only resets the timer. Since you got limited bonuses (each day?) it's a waste.
Another bug: When I got the spell that gives me gems, it gives like 0.1 gem/sec. However when I click gems now it only gives me 0.15/sec instead of 0.6/sec (it used to add 0.5, not it adds 50% of 0.1 so thats a nerf).
Little explanation for everybody complaining: Overseers will allow for auto-build certain buildings, see the white 'remote' thingy. You will get a building which gives passive gold generation (also a spell which does the same). Not sure for gems yet. The Mystic Box gives certain buildings free levels the next time you do the Dark Ritual. This game takes some time to start but after that it becomes really interesting. Still needs some nerfs here and there though.
The quests to gather food/wood/(metal?) need some nerfing. Its strange that I can easily clear them when I'm at cave lvl 1, but not after I'm at cave lvl 10+. Makes the farming kind of useless (just make the monsters's health/armor/dmg increase less hard, but also nerf the amount of food/wood/metal gained).
Game gets very repetitive very fast. All that's changing is the amount of times it takes from one to another planet. Also see the topcomments for very easy improvements. 2/5.
How much extra food do tools/cars produce? I can't figure out if i'ts better to put people on farms or on tools/cars. Could there be some numbers here?
Oil stuff is very bugged. Buying more than one level is cheaper than buying them one at the time. And levelling up the oil production doesnt seem to improve it.
I didnt get my 3rd hero at lvl 40. Instead my next hero is at lvl 60 of my keep. Which will probably take me about a year to get to (if I dont reset) :)
 "Press The Button"){kind=icon}
 "Cave Heroes"){kind=icon}
 "Destination Kepler"){kind=icon}
 "Crusaders of the Lost Idols"){kind=icon}
 "World Idle"){kind=icon}
 "Idle Business"){kind=icon}
 "SAGA Idle"){kind=icon}
 "Sancho Ponchek"){kind=icon}
I must take this on my fault, sorry for not intuitive quest.