My first Scifi book

I've never written scifi before but my husband and son told me they would never read the books I write. So I wrote one for them.
Any recommendations?

https://www.wattpad.com/1609725903?utm_source=android&utm_medium=link&utm_content=share_published&wp_page=create_on_publish&wp_uname=MinorKeysarefun