[DustyPorViva]

Unless you plan to implement custom hotkeys you may also want to experiment with not giving buttons labels. The hotkey bar is pretty easily associated with keys 1-9(or 0) now without visual guidance so it may be unnecessarily cluttering the aesthetics. Think of games like Minecraft, which just have a hotkey layout and absolutely no labels. If you're worried new players will have problems, perhaps leave it as an option to hide/show labels.

Also for more help it may be useful to provide all the information you can as to what data is going to be shown on the HUD.