I'm no expert on demon summoning. Maybe there are actually some clues in the text which tell you the right options. Unfortunately, I was pretty much just guessing every step of the way.
You need to summon a demon fast. So lay the materials, do something I won't mention here, then recite the incantation. For the first part, you need to pick from three of six materials, but as far as I can tell, you can't unselect anything, and if you pick more than three items, the game gets stuck and you'll have to start over.
I played a few times by picking at random (since I had no idea what to pick.) I managed to find two endings in the game, although neither were quite positive. (One was 'better' than the other.) Still, after about five or so replays, I was no longer in the mood to try again.
It was somewhat entertaining. Within the context of a 500 word limit jam, I suppose I could still give four stars.