In a classic point 'n click adventure way, the player takes over the control of Mona and directs her actions through a pop-up menu. This way she explores the various locations, talks to people, creatures and some times even machines in multiple-choice dialogues and picks up everything that isn't nailed to the wall - or almost everything. If Mona thinks an item may be useful in the future but doesn't want to carry it around because it's too heavy, she places a memory imprint in her inventory. This way the player doesn't need to remember where it was and can just access it like every other item from the inventory. To help the player even more with finding every clue and item to solve the countless puzzles, a button press shows every hotspot in the room.
As a vampire, Mona of course also has the ability to turn herself into a bat and reach points too high for her to access in human form. But during the course of the game she will learn additional useful skills.