Hi ! thank you for taking the time to play :D
I love how you touched on the artstyles and how contrasting they are. In fact, that is the whole point! Ideally, the cutscenes were intended to be drawn in such a style as to reflect the POV of the child and the swap to the Pixel art is just a means to switch to reality is all ^^ I can understand the whiplash that can cause though, but it was indeed intended!
Thanks for reporting those bugs :D we actually patched those out for the post-jam update (another available zip) and added our music and sounds there too, as initially it broke our builds so we had to remove them for the submission sadly :c