You sure can! You can add, remove, resize or move tiles by tapping “Edit” at the top corner of the Home screen.  While in “Edit” mode:

• To remove any tile, tap the “x” in the upper left corner of the tile. Don’t worry, you’re not deleting the device from your account, you’re simply removing it from the Home screen. You can add it back at any time.
• To change the size of the tiles, press, hold and drag the bottom right corner of the tile until the tile is sized to your liking. 
• To move a tile, press and hold the middle of tile and drag to new location. Once where you want it, release the tile.
• If you want to save your changes, make sure you tap the “Done” button at the top right of the screen when you are finished with your editing.