after i worked some more with it, i fear a bit to ask... but could you maybe please make an option to set empty tiles walkable/not walkable?
I dreaded this day would come... the day where I would have to delve once again in the edittime.js file. Ugh, I don't know why but I hate that! I prefer coding the runtime.js, much more entertaining! Rant aside, the files were updated! Get them again here.
I added a property that you can set at edit time, and I also added a behavior action so you can change empty tile "walkable" status at runtime.