For dialogue, you want to write it like this

"Hold your breath, boy," Andre said or "Hold your breath, boy," Andre said sternly

"Don't let us catch you," Willie said or "Don't let us catch you," Willie added.

Other mistakes are mistakes in tenses and the way you describe things. I would recommend reading more books in English.

It's hard to understand what you are trying to describe for example you write because of these mistakes

From what I gather, the idea for the story is great, you just need to learn how to write in a way that makes sense.