I like the game's concept and depending on the curse stages, different things can happen. Here's what I found:
Stage 0: Human. Nothing special. You can interact with objects and events normally.
Stage 1: Short fox ears. Entering the town will be harder now.
Stage 2: Short fox tail
Stage 3: Fox nose. If you find the cloaked figure, they will give you a lantern for free.
Stage 4: Long fox ears. You will always gain money if you track down a magpie, but you will lose humanity. You can also go through the thick fog without losing any rations, but you will lose humanity as well.
Stage 5: Long fox legs.
Stage 6: Long fox tail. You can no longer enter the town. The cloaked figure will give you rations and a lantern if you don't have one.
Stage 7: Fox muzzle. You gain more rations for drinking water. You can also catch fish without having to use your fishing pole. However, you will lose humanity if you choose this option.
Stage 8: Fox arms. You can no longer fish for rations.
Stage 9: Quadrupedal. The cloaked figure will think you are an ordinary fox and will not give you anything.
Stage 10: 100% fox. You have lost your humanity. Game over.