I downloaded the executable version after reading in the comments that there was a bug in Level 3, and I was able to complete all the levels.
I like the liminal aesthetic (even though it’s so trendy these days thanks to Hollywood), you’ve created an atmosphere that invites calm contemplation, and that’s much appreciated.
I’d like to be able to experiment with more levels to see the full potential of the idea, but it’s definitely quite interesting.
Great job overall!