It’s a first-person adventure game with no real aim, so don’t worry about “finishing” the game. You can close it out by pressing escape.
If you want to open the Unity resolution & quality dialogue, hold Shift during the launch, or Option/Alt on Mac.
- Left-click to grab an item, throw it away, and open doors
- Right-click to put an item in your inventory
- I to invert the mouse on the Y-axis. (Pardon the lack of a proper menu, I just forgot until it was too late.)
- Esc to close the game