2 Button Roguelike.
Button 1 = pass one turn.
Button 2 = cycle through Battle Styles/activate Option.
Button 1+2 = cycle through options.
The character acts by itself, attacking anything when in berserk mode, acting cautious with Balanced Mode, etc.
Of course it would be a long, linear dungeon. Corridor, Room, Corridor, Room, and so on.
Needs more options and many more detailed battle styles.
Tons of fun?
2 Button Game + Roguelike
Simplify the most Buttony genre down to a two-button interface.