So Google has a little project they call Area 120. It is a hotbed for little experimental ideas. This little game creation 'game' is one of those. It is called 'Game Builder' and it is free and on Steam right now. If anything it is a fun little thing to mess around with.
It is actually pretty cool. It supports multiplayer ( your friends can even play while your building your game lol)
The actual App on Steam <------- (FREE) https://www.blog.google/technology/area-120/create-3d-games-friends-no-experience-required/
Anyways Check it out if it interests you!