Collect as many objects as you can, and use them to trigger actions that allow you to advance in this adventure game in a marine environment.
Move the mouse on the objects to get a detailed description of them; click 'i' to open and close your inventory or return the items to it. Click items on the inventory to activate them or use them. You use an object for its usual functions (for example, with the knife you can cut things). Click on the objects you find on the way to collect and store them in your inventory.