Power Point is a ghastly piece of software, IMHO. I designed games when I was six or something, long before programming and I always dreamed of being the designer and bossing code monkeys around. Then I learned to fiddle, the rest is a long story, sufficed to say that during my near-dcade away from programming, I tried almost everything and you'll never get the level of control you want without, at absolute minimum, scripts. Full control and you need some coding. So I would suggest a point 'n click game maker with scripting over PP. Then at least you can put something of yourself into it unless you want a trashy generic game.
Also, sidelining the discussion a little, I believe LibreOffice has a Power Point equivalent that probably works better and LibreOffice is free on Linux, Windows and probably Mac, too. Food for thought.
If you're wanting to build a Text Adventure or Visual Novel, Ren'Py is great because you write it a little like movie script but you have the option of Python scripts, too. It's possible to make an turn-based RPG or Strategy Game with Ren'Py as well.
TL;DR: Power Point is a bad idea and you'll regret it, I'm 85% sure.
"If you don't stand for something, you'll fall for anything" -- Wise Man