Really cool entry! I love the concept of the reaper as a helper and good guy rather than villain, and I love the art style :)
Maybe a suggestion for improvement could be to have some particle effects, or even a feature where the souls slow inch back towards the start of the level?
I think there's a nice combination of things done well here, but I think what stood out to me at first was the neat dialogue system. It wasn't immediately clear to me that I couldn't push the ghosts into the fire, but once I got the hang of it I made it in a few levels. I'd suggest increasing the character speed, and the force in which he pushes the ghosts, and it felt like things were moving along a little slowly. Otherwise, I'd say well done team!
Maybe a suggestion for improvement could be to have some particle effects, or even a feature where the souls slow inch back towards the start of the level?
Also, Im a UI enjoyer and I loved the text!
Great entry all round though :)