Adding an in-game bonus for Achievements would be a good idea. In an Idler, an achievement which is just achieved through time is kinda boring and has no real reward value from knowing i got the achievement.
Found a bug in the last level. If you hat a mannequin and let the mannequin get crushed by the gears and then switch, you pretty much keep just going off screen.
IF you defeat the last scouting mission on the left tree branch before you construct sky city, when you construct sky city, it won't let you get a second angel.
It's good for fire, and sometimes other things