Shouldn't leveling up recycler not be from the current cost? This means that using the recycler before fully purchasing the 'Cheaper Recycling' upgrade would put you at a pretty substantial disadvantage, unless the upgrade diminished costs starting at the base value.
Bug: telling the factory to auto-build 1 of each type of golem resulted in 4 golems being built even though I only had one slot available.
Good job on the game, keep it up! It's got loads of promise :D