The way her game was represented is honestly pretty top-notch. From her character, to the animations, the abilities like the feather, the badeline tag team, and the crystals, even her talks with badeline are faithful to the source material. Morø really knows his indie games.
I really like the way they first showed Badeline as just an evil version of Madeline, but then they revealed her to us as a pretty reasonable character who evaluates the situation and discourages Madeline from taking risks.