Honestly, I couldn't play the game.
The text was too slow (Need a skip button, or at least make it faster)
The Item you get is literally there, I pressed D trying to test out controls and just got stuck in an endless cutscene (Or seemed endless, some of the Dialogue got a chuckle from me so you get a point there).
Technical advice: Your HUD seemed to not be scaling to a resolution, It looked fine to me not on fullscreen but broke on full screen. Canvas scale to resolution is usually a good choice for that.
I'm not sure if there was much game besides from the dialogue and the first screen... As for the theme, I didn't see it since there was no real game as far as I played sorry to say.