I like it, I usually don't appreciate poems in English (Arabic is my first language and our poems are different, and in just my opinion more beautiful.) But I liked this one. Maybe because I can relate?
I think this part:
Today I'm king
The world is my backyard
Could be changed to:
Today I'm king
The world is my garden
Changing backyard to "garden" or "domain" is better suited for a king than backyard (though I guess it still works,) I think it'll be more natural and won't turn off the rhythm too much. What do you think?
Imo, a garden is usually kept pretty while the backyard can hold whatever mess the owner wants.
Ah, that's... Didn't think of it this way.
Thank you for reading it!