Thanks for playing and the feedback.
Our kids have been an active part of creating this game. It was one of them who asked if the party could be Slimes during the original jam brainstorming. They really like Slimes since playing Dragon Warrior/Quest.
We are working on the tutorial. We tried to add all the things people have said they did not understand, but it did make it a bit long. I'm planning to add a tutorial for the inventory soon, and it will be based on popup tooltips. I'm thinking of adding something similar as a shorter combat tutorial option.
Currently you cannot consume/use any items outside of combat. We plan to change that, but it involves a new system for hunger/fullness to limit how much you eat and items having additional stat effects.
The Enemy Plans was a feature that was requested early on by jam players. It is nice to have for casual play, but does give you a big advantage. We plan to add in difficulty levels later on, and it will be one of the settings altered by the default difficulties.