Thank you!! I won't be able to finish it in time for the judging period, but it is what it is, I suppose.
But omg thank you for pointing out those collision issues?! I realize now that it's because I added that tileset but didn't mess with the collisions manually (sob) lesson learned...
Admittedly, the big scale of the kingdom was me using RTP for the first time and going 'ooh, how do I use this asset/layering/etc? and then getting incredibly carried away. But I'm glad it worked out!