Great game idea! It perfectly fits the theme and it's fun! The game does a great job to reinforce the idea and I found myself totally immerse on the game world.
I really loved the dynamic music, it's a nice touch!
I think you should work a bit more on the base mechanics. Movement can be improved, I found the jump a bit floaty and you can add some other mechanics (like dashing or crouching) to expand player options.
Overall, it was a nice experience and I enjoyed my time playing the game ^^