Cheers! Yes UI definitely needs some work. It's not immediately obvious when the current coin is 'active' vs the one on the left, and yes as you mention the turn indicator could be a lot more obvious, particularly given the size of the playdate screen!
I intend to keep iterating for a month or so and see where I can take it. Feels a bit like a basic physics sim atm, need more gameplay. However I have learnt an awful lot about the Chipmunk2d framework along the way which is handy.