It’s just a bunch of static meshes, animations, sounds, and special effects. They probably didn’t put it all together so that you’d have more versatility in what you do with them. It’s a well made pack and imo doesn’t deserve the bad review you left it, especially given that it’s free. If you’re looking into putting it all together and giving it functionality in your game, you might want to look into some beginner tutorials. Here’s a good start: Animation How To's | Unreal Engine Documentation