The hotspots are not really automatic, you have to place the one animation you created by hand on every object.
There is a description how to do it on the Wiki.
I didn't look at the time, so I don't know how long it took me. Maybe 4 h? It is on the easy side, I would say. I spend a lot of time trying to combine random items, because I didn't realise I had just overlooked something. So with the hotspot revealer it will get even easier (and shorter I guess), but less annoying :-) But everyone could decide for themselves if they want to use this feature.
What I am working on? Well, actually I'm just doing very short games at the moment. I discovered my liking for game jams and did a few games for visionaire-jams and the last AdventureJam. I didn't finish my game for the last visionaire-jam, so I'm trying to do that and my game for the AdventureJam is in dire need of some bugfixing. And because I can't decide what to do first, I end up doing nothing ;-)