Tertium Quid Games
The object of the game is to place the pieces on the board to create a loop, using every piece and obeying certain constraints that are different for each level. There are 37 levels ranging from hand-holding tutorial to absurdly hard. This game was inspired by the puzzle toy Cool Circuits, made by ScienceWiz. If you enjoy HEXFOLD I highly recommend picking up a copy of Cool Circuits.