Yes, they function and while a one click system isn't what I'm used to I don't feel the game loses anything through its implementation. I have two minor complaints. One the mouse-over circle is a little too large, especially when there are some things close together, when placing objects the hotspots are highlighted which works fine but when simply clicking it feel a little inaccurate. Two, the more irritating, is that one has to drag the inventory items to each individual hotspot in a scene, opening the inventory each time. I imagine this works fine for touch controls but it feels awkward with mouse controls. Could there be a way to implement a 'use previously selected item' button, even if just for the non-touch release?