Hello,
It's quite complicated to do that for all the battles given that every change in the story implies multiplying the number of branches in the narrative.
So, the main battles (like Omiko's) will always result in a game over if a wrong choice is made. However, the secondary battles will be more forgiving and won't lead to an automatic game-over.
It's a delicate balance I have to find to make the game interactive enough without risking making the project unmanageable on my part. That's why the number of choices will remain limited. People can't expect 20+ choices every update.
Thanks for being the first comment!