Thank you very much! I totally agree about the sound design. I went with a more silent approach so that the music could deliberately help to tell the story at the start and at the ending. And I'm glad you found the hidden walls! It felt fun finding them out when I was play testing. I was wondering how many of them people would find.
These UI issues arose on the last hour of development as I had to downscale the UI Canvas for it to fit in the 64x64 constraint. But thanks for pointing them out, I'll keep those in mind!