We strongly recommend you play on a large screen device, like a laptop or tablet. If you don't have one of these, you can use your phone in landscape if it's big enough, but we strongly recommend mirroring it to a TV so everyone can see it clearly. Whichever device you use, test the game works as expected before the night!
If you are using a phone or tablet, you can "Add to homescreen" in Safari or Chrome to make the top navigation bar disappear. If you're unsure about how to do this, Google "iOS (or Android) add to homescreen".