Get over it kid. I worked 40 hours a week in the evenings while taking summer classes and pulled a 4.0 in college. I feel no sarrow for you. And for you, there is no way to say Hey, give me my money for the day I worked. I can't be working here anymore. Thanks anyway, heres the shirt back if you want it" without being a douche for you, especially on your first day.
As for that last part, if he paid you and you just never came back, you have officially relegated yourself to d!ckhead status for that thought. Never screw employers over dude.