Very nice game, I enjoyed it a lot! I'm thankful for the Linux build.
Here are some issues I had : pressing escape while on the computer is broken. Could not find out how to paint a room walls or choose a room color. Rodents going over traps that looked like they should work (the mechanism was still there). Customers saying "nice [thing] color" when the thing was not their preferred color. A lot of visible edges on walls, probably bad alignment in models. A graphic issue with ghost (probably due to depth sorting and transparency, see screenshot). I think the "main menu" button on the pause menu is broken. A way to see the controls after the intro would be nice.