Thank you for playing my game and enjoying it!
Indeed an Undo would be a good feature. I'll add it for the next Demo Day.
I'm happy that you like the artstyle!
Yeah the UI is atrocious. It was made quickly to have atleast something for DD. I have yet to come up with a nice layout and especially a pleasing style that would be doable with my programmer art skill.
Thanks again for the feedback!