RPG for G40

For my project I am making a sort of horror type RPG sort of like fnaf. But not fnaf. I am NOT making a fnaf remake or fan game. For those who don't know, RPG stands for role playing game and fnaf stands for Five Nights at Freddy's if that wasn't already obvious. I say "sort of horror type" because it will still be horror in the sense that it have the same unsettling feeling but there won't be any jump scares or maybe there will be jump scares. You never know. So any way, so far I've been experimenting with coding websites like scratch. I want to move on to actual RPG creators but all of the ones that I've found so far are only downloadable or you have to pay to use them.