I added lights to the game, or maybe it's better to say that I added darkness.
I set up lights to be grabbable, and to say whether they flicker or not as well as having different radii, the idea being that the player can use them to light a path or find items. I found this code here to get the idea working and then adapted it a bit for my needs
How to draw a flashlight in a dark room? - Playdate Developer Forum
My next goal is to add lights of different shapes using images for the mask.
I'm still not 100% sure on how this'll play out in the game for real, but it's adding a bit of mystery to the levels at least