It's clearly a very early prototype so I won't go on about obvious things like you fall through the floor when spawning and that's no good.
However here are a list of things I think would make for much more natural controls and an overall better UX:
-The "open" sign should be highlighted as other interactable things are when I'm looking at it.
-If I can pick up things with right click, I instinctively want to put them down with either left or right click, G is clunky.
-Player control is super slippery and feels terrible. I know it's just a prototype but please give the character better movement
-Make sure that you place the items the character carries in their hand on a separate camera so you can move around carrying them without clipping into things
-I couldn't figure out how to make a cup with two shots of expresso, I didn't try that hard, but I would hope it is a bit more obvious in the future.
Other things I don't wanna mention since most things will naturally improve as you keep devving. I think the concept can be fun but obviously needs a lot of work, so I hope you keep at it!