Looks crisp although for some text boxes like the bag for example have no contrast between the gui and the game, i suggest maybe adding a shadow to the boxes to define them from the actual game.
Other than that, I like it, somehow reminds me of windows 8 gui's, idk why.
Although i have a 22" screen and another 14" smaller one connected as well, having a smaller gui would be nice to have, like in minecraft. Maybe even an option to disable the gui like the chat box.
+1