I have over 300K materials and it is very annoying to press 300 times to improve my drill or battery. Pls let us choose how many materials we want to use. However it is greate game, I am looking forward for the next updatings.
You should give the black key after a week of playing or increasing the rate of their dropping in the multiplayer mode (if it is even exist). I've had decreasing interest to the game after the couple of days because of lack of levels, waiting for many "leavers", and boring of almost no chances for opening one of three black boxes I randomly received in first days. This game has the potential. But "pay to win" as people pointed out here is strong disadvantage of this game.
Add the opprutinty to name formations. I'd be nice if I can name them "attack", "farming gold", "click damage" and so on and to not remember what formations actually focus on.
I really enjoyed playing this game. I haven't realised how to solve "Nonograms" before. But this game teached me. Thanks you, guys, for that! It is very intresting thing to have a good time!
Already have finished "Ark" and almost "Genesis". I'm looking forward to your new game.
 "Reach the core"){kind=icon}
 "SAS: Zombie Assault 4"){kind=icon}
 "Crusaders of the Lost Idols"){kind=icon}
 "Specter Knight"){kind=icon}
 "Flash's Bounty"){kind=icon}
 "StrikeForce Kitty"){kind=icon}
 "Night Lights"){kind=icon}
 "Sports Heads: Football Championship"){kind=icon}
 "Give Up"){kind=icon}
 "NoNoSparks: Genesis"){kind=icon}
We'll see about capping that.