Overall the idea was good. It was a shopkeeper/barkeep type game where you have to fill orders. However the only issue I had was not telling me where I needed to turn things in. It took me a while to realize what I thought was a shoe in the background was a register. and in level 2 and 3 it took me several games to realize that the feather thing was a combiner. Since you had the mechanic pretty solid I think a very basic tutorial would have been good or possibly some better cues artistically. I assume the "white" was how we were supposed to interact with things but I would want maybe some color matching pallet for the shopkeeper and his interactables. I think the random stuff on the shelf also confused me as to what I could actually interact with. 
If you did some proper pixel shading you might be able to make those two things appear to be in the foreground making it easier to realize we needed to interact with them. I kept trying to turn things in at the door for the longest time. Another possibility would have been to very minimally animate those interactables. 
Either way not too bad of a game.