what?? how?? genuinely i really want to know how you did this haha
Infinite money: just return to the main menu then start a new game. Your previous build will be there and you can just sell it for extra cash and repeat as many times as you want.
Frame jump: Make a box as in my screenshot then hold forward and tilt forward (I think?) and you will slowly roll forward, eventually that speed just ramps up and you will go flying across the entire stage.