Wow, cool to hear that the GUI came together quickly. I'm sure that's down to experience (and skill). I know doing something like that would have taken me a long time :P Making interfaces takes a lot of work! You're using Godot, right? I've only tried it a bit, and I never got around to the UI part, but maybe I should check it the tools to see how it works.
Yeah, the 2D sprites worked great, and I think I forgot to mention that I really liked the contrast with environment having shading and shadows.
Looking forward to the update ;)