This is a list of usable items for performing rituals:
Ceremonial Knife[]
On the left, above the bust that holds the mask and ritual amulet.
Ritual Necklace[]
On the bust on the left side of the room.
Ritual Mask[]
The top part of the bust on the left side of the room.
Ceremonial Robe[]
All the way on the left, tucked in the cupboard.
Offering[]
The mini-fridge tucked underneath your desk by your bed.
Life[]
The unlucky turtle situated above your desk.
Candles[]
Clicking on the candles on the ritual circle will alternate between red lighting, black lighting, and off.
Sources of Light[]
The lamp and light switch by your bed, the candles on the floor, and the curtains on the left side of the room.
Ritual Marks[]
Clicking the chalkboard to the left of the ritual circle will change the chalk drawing on the board.
Locations[]
You can go outside by scrolling to the right and clicking the rightmost door. You can also enter the bathroom by clicking the door adjacent to it.