Well, I think you story really needs details, and the pace is very strange. At some parts the story flows easily from one part to the next, and at times parts seem fragmented and even slightly confusing. You're also saying things twice... saying both the sultan climbed on top of the strongest gate, which was also the gate to the city is not needed. I fear you might be developing a habit of over-explaining, which is not a good thing to have (believe me).

just imho of course