@sniperman2 -- I'm not so sure, given his business model. On one hand, he pays his employee ~$100 a week (with a 5% raise nearly every day), plus whatever tips he brings in, but he does make the employee purchase decorations, uniform upgrades, and cooking aids. On the other hand, with an average of 7 customers/day, he could make about $40/day. So revenue of ~$280 week - ~$100 week and rising = ~$180 week profit (and dropping), minus taxes, building lease, maintenance, etc. It makes for a fun game, but the reality is he wouldn't be rich.
I don't really care for the "disabled" upgrades on previous levels. Isn't the point of upgrades to make yourself better, go back to earlier levels, and achieve more stars that you struggled with prior to upgrading?
"Whoa, Gary, you look different. What's that green thing on your-- OH MY GOD, Gary, you just exploded! Are you OK? Oh well, guess I will resume standing here. Not much goin..." *thup*
 "The Naked Alien"){kind=icon}
 "Surgeon Simulator 2013"){kind=icon}
 "Hex Empire"){kind=icon}
 "Life of Stickman"){kind=icon}
 "Portal 2D"){kind=icon}
 "The Suspense II"){kind=icon}
 "Jelly Escape"){kind=icon}
 "Papa's Pancakeria"){kind=icon}
 "Killbot!"){kind=icon}
 "Mr. Bree - Returning Home"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Let It Glow 2"){kind=icon}
 "Musaic Box"){kind=icon}
 "Invertion"){kind=icon}
 "Count to 100"){kind=icon}
 "Fisher-Diver"){kind=icon}
 "Infestor"){kind=icon}
 "CycloManiacs 2"){kind=icon}
 "Papa's Freezeria"){kind=icon}
I tried to keep it small and out of the way, just as a reference in case you get totally lost. Did you find yourself using it a lot?