Look. Both games are actually great. ULTRAKILL has some poor graphics, I know, but it still has some room to make fun with. I have the full version of the game and it was a blast playing through the entirety of it. Meanwhile, Roblox is almost boring and only has a few experiences that have fun in it. There's no limit to how many games there can be in Roblox but yet some are either the default starter places, unfinished places or those "simulator" games. However it also houses some of the most fun games you may ever imagine. If you actually want to do something, GO BUY THE GAME ON STEAM. You will find out soon.