This is like one of those games where your an adventure where you do quests, buy stuff at the shop etc. Except for one MAJOR change, you're the shopkeeper.
Instead of saying you failed because you didnt get enough money, it should just let you take the money because eventually you will be behind and the levels will get harder. Like this if you agree :P
 "Swords & Potions"){kind=icon}
 "Odd math out"){kind=icon}
 "DuBlox"){kind=icon}
 "Bed and Breakfast 3"){kind=icon}
 "Extinct! Are you smarter than a plant?"){kind=icon}
 "Mastermind: World Conquerer"){kind=icon}
 "Battalion: Arena"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "Post it Draw it"){kind=icon}