Its pretty innovative analog game. With budget of -2$ i mannaged to build many assets using only some paper, black tape, and few empty boxes. Gameplay requiries vr headset made of paper or cardboard.
Puzzle design challenge (Sponsored by Red Bull Mind Gamers and The Tetris Company®)
Language-Independence (Sponsored by Valve Software)
Non-digital game (board game, card game, physical game, sport, etc.)
DYI PR (Paper Reality) headset