I thought everything was pretty easy to use as soon as I realized what clicking a button would do (a little trickiness if you open the tile while the button is nearly off the top of the screen but honestly really great)

Because I don't know what the drop off rate is when someone reads this, take what I say with lots of salt.

Giving one button as a demo and then saying click on button to close (and leaving it implicit that the rest of the buttons need to be opened manually) seems good? Leaving them closed by default worked great for me!