I re-uploaded the game as and html5 file, and while I was at it I replaced the music. Music credits can be seen by clicking the question mark on the lvl select screen.
If you're stuck on the part where you have seven deductions and only the top two form a connection, you have to go to the house that ordered the pizza and use the gun on the door. The hint to analyze all your clues is just to unlock the location on the map. Even if the hint doesn't change after getting to the house, you deduce the culprit later.
I usually cook a bunch of hamburger patties at once, so I don't have to worry about them burning while delivering the hamburger to the customer. Even if the patties loose all their heat it's still possible to get a star with each customer.
 "Elemazel"){kind=icon}
 "ZS Dead Detective - Brain Drain"){kind=icon}
 "Bloons Tower Defense 4"){kind=icon}
 "EBF5 NPC Maker"){kind=icon}
 "Electric Connecxion"){kind=icon}
 "Papa's Burgeria"){kind=icon}
Correct! Many players seem to be stuck on that point, this is good advice!