It's a good game! The Puzzles are nice and the Gameplay is fluid, and that little change with that music when you change between human and ghost are good. The Concept was unique and executed good, and the sacrifice didn't feel illogical because you couldn't do things as a human that you could as a ghost, and vice versa.
The Puzzle mechanics were good and sometimes hard to figure out. ( Example for me: How long it takes the TNT to blow up and the fan mechanic. ) It took a minute to exactly understand the mechanic. The Puzzles were nice, ( even though I am NOT good at puzzle games... ) they presented a decent challenge. The Collectibles ( AKA. The Pigs ) presented challenges that you needed to think hard to figure them out.
The Graphics were clean and simple, ( Plus Pixel Art games are my jam ) and the western theme went with the game's look and atmosphere.
Overall, it's just a good game! I'm not the BEST at puzzle games, but I think it's a good game. The Graphics, the Music, and the whole game. Nice job!