Hi! Thanks for playing and glad you enjoyed it. ^.^
The GUI was taken directly from robobarbie's Thursday Laundry and tweaked just a tad (definitely go check it out if you haven't, it's from last year's O2A2 - https://robobarbie.itch.io/thursday-laundry). The team definitely did a fantastic job, I'm so grateful to have them on board.
Regarding the themes, I'm glad they way I approached them resonated with you! These questions have also kept me up a bit. :')