I made this UI and was wondering if there is some type of feedback I can get to improve it, this is not for a game/commission and is a practice UI because I am learner/beginner 
change the colors and everything should be in one theme
Nice Job! (#help-and-feedback:creations-feedback )
I think the colors are fine, and the theme is relatively consistent.
Since you have wood in the background and on the shop sign, maybe add some faint wood texture on the top bar?
Also for the X maybe make it a rounded cube as well as all the other buttons on the screen? I do like how it looks but there are no other hexagons.
Maybe the dark gray in the back could match a bit better? I like how is is now but hmmmm i dunno mess around maybe?
OVERALL GOOD JOB