The first star coin can go kick rocks

WHERE IS THIS STUPID STAR COIN, I AM GOING TO LOSE IT IF IT'S IN A WALL OR SOMETHING

WHERE IS THIS STUPID STAR COIN, I SWEAR IF IT'S IN A RANDOM WALL I AM GOING TO LOSE IT

I remade 1-1 (SMB3) from memory, have a go at it and tell me what you think. (Sorry I don't know how to make one way pipes)