Way to go, Sammy! Congratulations on your playground being one step closer to complete. I would also suggest that you think about the reasons you would like the playground to be accessible for visitors of all different abilities. Including things like ramps and accessible surfacing is very important, but since they're a little more expensive than other playground items, sometimes they get cut from the plans. Take a look at the featured accessible playgrounds on KaBOOM!'s Accessibility pages to get some ideas of what makes a playground truly fun for everyone. Keep encouraging others working on the project to give it a Universal Design, meaning that it is easy to use by all different kinds of people.
Good luck - it's great to see such a young person make such a big difference in their community!