This is only a nitpick, but if your game doesn't use the mouse, find another way to "close" UIs, having to find my mouse just to click a button is kind of annoying ^^ Nice art !
Oh, maybe it was not very explicit (or just didn't work) but [Enter] or [Space bar] should do the same as clicking the button. Also if you use a controller the "jump" button does the same. Thanks for the comment !
