annoyingly easy if you know the slightest bit of graph theory, there's no menu, the "instructions" menu button looks exactly the same as the in-game "hints" button, the instructions fade on a timer (???????) and you ask kreds for showing the solutions? I just don't know anymore...
 "GlowPuzzle"){kind=icon}
 "NinjaCannon"){kind=icon}
 "Kick Out Bieber"){kind=icon}
 "The Fabulous Screech"){kind=icon}
 "My \"Dear\" Boss"){kind=icon}
 "Grey"){kind=icon}
 "Manufactoria"){kind=icon}