When you click the "Daily Game" button, it will do one of two things based on whether or not you've attempted the daily game already today.
1. If you haven't, then it will bring up the menu that explains what today's daily is, where you can click "Play" or "Back".
2. If the game thinks you have already tried the Daily, it will bring you to the screen that shows up at the end of the game with the stats from that attempt, with the only button available being "Main Menu".
This is because I designed the daily game to only be attemptable once. You can circumvent this by playing again in a private browser.