Thank you! This is really good and accurate feedback.
You are totally right about the collisions. Level design was one of the last things we did so there wasn't too much time left to playtest and fix that.
We are also not perfectly happy about the spirit/indicator colors. Ideally there would also be symbols or other traits to distinguish between them for colorblind people, but we didn't manage to get into that and decided to keep the colors as distinct as possible.