The Breakdown is an old school, point'n click adventure game. Like the ones made by Lucasarts (but not as cool). From your childhood, remember?
In version 0.99 there's a little bug with the inventory system when there's more than one row of items visible. If you move your mouse cursor up just so that the inventory pops up and immediately move your mouse down, the inventory disappears before you can select an item from the 2nd row. As a workaround, to prevent the inventory from disappearing too quickly, move your mouse all the way up to the top of the screen and only then move it downwards.