Damn that aint bad at all. I really like the flat UI style and that font! what is that font?
The best thing is the drop shadow around the borders. The UI looks like from windows.
I like it. Although, I do think that the 2nd, 3rd, and 4th screenshots need a little more contrast within the frame. For example, some of the icons and text on the shop and settings frames are hard to distinguish against the background. I also think making the blue background just a little brighter would help balance out things. Good work
The task of designing UI in an external application is one thing, but attempting to replicate it in Roblox’s extremely limited UI design tools is another.