No sound or music? It really makes a huge difference.
I think the follow-camera could use some damping or dead zone.
The main character does have very grumpy/aggressive facial expressions haha.
I liked that it wasn't too difficult and needing to die to complete the level was an interesting mechanic but there was no challenge or "game" on the ghost levels, it was completely linear, no jumps, just walk forward collecting diamonds til you get to the heart.