It was made with Pico 8 right? I believe you still have some kilobytes left to write code, if so, you could create a simple blank screen with some basic tutorial, I was gonna tell you to put everything that you have on the game's page, but I it's too much information. Since I'm here I'll rate this game on this comment. Considering just the information on game's page, you can tell that is game with good content, I played a bit and I shall play it a bit more in a near future, well done. (Consider what I said about the tutorial, because most people forgets about the info on the page)
PS: If you have the time, please try out my entry https://itch.io/jam/lowrezjam-2018/rate/293637 (don't forget to rate it : ) )
Cheers