* Access the diary (A) to review the state of your investigation.

* Activate the UVLAMP (B) whenever you encounter a red ballon (C) throughout the game. The lamp will reveal hidden codes and messages.

* Items will be stored in your inventory (D).

* The goals (E) summarize what you have to do next.

* Press the button (F) to get a hint whenever you get stuck.

* You can choose from three grades of difficulty: casual, hard, and advanced mode.