Yeah, I totally agree that sounds would improve the game feel tenfold. Sadly I didn’t know how to approach SFX in a game where you can move through time pretty much until the last day. I have had this idea to record them in a similar way to the dynamic objects motion and velocity and to play them back when the time slider gets moved but sadly it was too much to add as I’d have to create my own sound file data.
Instructions, on the other hand, I didn’t even think about apart from the description on the Itch page so thanks for pointing that out to me. I think when I playtest a game I forget that I’ve been through the entire process of its creation and therefore already know what to expect and how each mechanic works down to the source code.