The level editor is a great tool, its similar to the smash bro's in terms of ease and building blocks. Again, this is really only fun if you are planning on having people play these levels with you. I had three people playing last night for about two hours, but I think if we didn't have plans, we could have easily played for another three hours. The puzzles are challenging, the co-op is intense, and the last man standing is brutal! We were literally screaming out loud, trying to avoid the monsters as well as each other. I really hope they come out with more maps and possibly more traps, but its near-perfect as is.