Digressing from the gamey bits for a bit…
I think in terms of art style, it needs to be tight and really concise. The collage-y thing could be cool if done right. But I feel given the time…
What about a black and white style?
One Upon Light
Okay, some that are not entirely black and white…
Everyday the Same Dream
Toby : the Secret Mine
Albert and Otto
Selma and the Wisp
Back DeviantArt was still a thing, there was a creator named Katy Towell that made animations of creepy children.
Hmm… Or is it too overdone?