Merge Academy all spaces filled

I think some people are getting confused with the "trash can" in the first area that you can click on and get items.. and the little trash item when you play the game and want to open a spot on the board.

To empty a space- Click on what you want to discard.  At the bottom of the screen, you'll see a little area that tells you what it is and more about the item/level and  either a garbage can (in red) will show or the option to sell your item (in green) for crystals. It's more useful to sell the item, as you can earn more crystals.

I've included a screen shot to try to explain where to find the red area to delete an item.

Hope it helps!