The UI itself is great, but the only thing you can improve on here is the padding:
Other than that this looks great! The font is also pretty nice(depends on the game genre).
Seems pretty cool I think you can improve on the scaling of the actual GUI. Just a few tweaking should be fine, maybe put the YES / NO textboxes a bit smaller.
You’ve only done this for a week and you’ve done amazing progress dude. Well done! I’m a UI Designer / builder myself, and I’m very impressed for a starter.