I'm so glad you enjoyed the game. It makes me happy when people notice those small intentional details. Meta_Crystal did a fantastic job on audio / music.
Mechanically, we had planned for much more variety, but in the end we had to focus instead on just getting something playable out the door. I'm so glad you enjoyed it despite its simplicity - we're looking forward to expanding on this project a bit and realizing some of those original ideas we had going in.