Cool game!
Small note that at some point I think I double clicked the continue button to transition to the next customer and somehow froze it and I was unable to click anything, so I had to refresh. The cheat code also didn't seeem to work (did you register Ctrl+Alt+Minus as a physical keybind? My keyboard layout might not be the same as yours so that might be it). I did get all of the upgrades afterwards but I was unsure if there was anything more. I like how it's centered around chances, my game's pretty similar in that regard! Your dialogue is quite fun as well.
All in all, nice entry!