NOOOOOOO FLUFFFLN'T!!!! :'(
The puzzles are very clever, and the difficulty ha a nice curve. I really enjoy the fact that new mechanics are discovered, and used through each levels. The rotating ball is a nice touch for player feedback. The shadow of Fluffn't near the tombstone is a nice idea. And the change of filter color is clever too. Overall, everything works well together, with great ideas along the way, and the game is a pleasure to go through!
I would say that a nice improvement would be to work a little bit on the sound design. Adding a sound when the tombstone is teleported could be fun for example!
Solid entry there!