This game is really cute and I think has a lot of potential as a 3D platformer! The 2D character contrasted with the 3D environment looked very good and I think the aesthetic of the game is already fairly strong, even though it is a work in progress!
I think the camera and ghost movement mechanics open up the possibility of some fun puzzles, especially if some of the ghost paths are broadened to wider areas so the player needs to think more about the ambush placement.
The movement and camera controls felt very good and were definitely the first thing I noticed. The only improvement I would suggest is tweaking the ghost catching camera control as it can feel a little bit awkward.
I also noticed there is no sign explaining how to ground pound which made it so it took me a while to even realize I could access the rest of the swamp level. I also think the swamp underutilized the ghost mechanics and at time lacked a sense of direction, but the design of the platforming was very good and felt good to get the hang of over time. The time trials did add replayability too which was nice.
Overall I had a lot of fun with it and think it has a lot of potential, looking forward to seeing more!