So far it's silent but at least some sound effects are definitely on my todo-list.
I kept the instructions short for two reasons:
1. They needed to fit the help page, which was a first quick rendition so I have at least that one instead of nothing. Some type of title page and a more detailed intro is another item on my todo-list.
2. While I could have added some more details about game-play already in the readme (although that's something you only get when you download the source), I wanted to see how intuitive the mechanics are to get into. So some of the feedback about game-play are what I had been asking for...
Together with a bugfix update I will add some detailed instructions on the itch.io page in a few days, either directly in the game descripion, or as a text-file for download.