Here are some changes in Horau 2,

instead of 10 stages, there are now just 4 stages. (just to make development easier.)

Its extra stage is now scrapped.

Its stage select is now scrapped.

Most of the characters and most of the music will be replaced/scrapped, but few will stay.

Stage 2 character will be the villain.

The same story from the first game will be replaced with something different in Horau 2.

Aoi's brother is now erased from existence.

The House of Sansumeta is now a mansion now.