"I hope you enjoy the play" sounds more natural.
They both mean the same thing, but the first one is more natural. In English (American English at least), we use "I hope" a lot when we want something to go a certain way but there is a possibility that that 'something' my not happen.
For example, if you want to hang out with friends this weekend, but you are uncertain on whether or not you will be able to hang out with them, you may say to someone "I hope I can hang out with my friends this weekend."
If you say "I wish you enjoy the play", you would be understood, but it sounds unnatural.
Does that make sense?