Then I'll definitely look into ways to have it run properly on mobile. Currently, the javascript based RPG Maker MV that this is built on runs very poorly on anything without a GPU if the game has a lot going on. Definitely not the right engine for a game like this so perhaps next project we will switch engines.
Do you mean the current demo? Or the full release story mode when it is out?
In Demo: All fights fought is about 10hours. Another 8 for each character in the Cosmic Trials.
The full game will be somewhere over 30hours. Demo has 2 chapters, while the full game has 9 more. There will be no grinding or padding so all of those hours will be unique puzzle, fights and quests.