In the Game Djinn menu press the following button combinations Up(2), Down(2x), Left, Right, Left, Right, B, and A
Unlock New Game+ Mode
For this beat the game once to unlock new game+. With strongers enemies and with time limit.
VHS tapes bonuses
Spread over each level are 3 VHS tapes and gathering particular quantities will unlock various bonuses.
Unlockable: --- How to Unlock:
Concept Art --- Find 12 VHS tapes
Hidden Cheat Codes --- Find 42 VHS tapes