Scream, Guardian Pal, troops and spells have their physical key for PC users except Pause function.
If possible kindly add Pause key. May be “A” key or a “Space bar” key and same key to resume.
Sometimes PC users(like me) don’t know where the pointer is. So if you implement this, when we are lost in Game we quickly press the Pause Button(A) and find our pointer and proceed .