I think its a fantastic first pass. A few things immediately jump out to me.
I think you should give elements more spacing between one another. Everything feels just a tad bit cramp.
I think the header is needlessly large and wasting space. This is more of a personal nitpick, I admit, but it is still something that stuck out to me.
A few of the redish buttons seem like they overhang outside of their parent. You should consider #1 on my list and maybe make your panel a little bit larger to give yourself the space required to include all the information you want to add.
I feel like the elements are a little too rounded? You may find that everything fits together with a less aggressive rounding. Again, personal preference.
That looks very good, but for a admin UI, it might be a little to much of the fancy.
It isn’t something the player will need to see every time, probably only a admin. So the fancy stuff isn’t that necessary.