Hey there, sorry about the softlock! There are a couple spots where this is possible and I'd like to come back to make some small edits in the near future.
I'd highly recommend checking out the original game, To A Starling. This is just a map hack for Peteksi's game; they did all the coding and art, I've just done some remixing. But I agree, the pixels are great and they used the alternative palette really effectively!