Yeah, these are usually the 2 main thoughts I have when I decide im going to create a page.
Get a good concept ( time taken can vary )
Does it have enough information to be a good level? ( contemplate life choices for 30 minutes, then think about what stuff to add that "connects" if it doesn't have alot of information )
Try making something supernatural, like something that doesn't involve long and random hallways or a level that doesn't entirely rely on the darkness just for it to be intimidating, or a level that's not filled to the brim with entities.