The player can add, move and delete buttons on the screen.

The player can add, move and delete buttons on the screen. 
 
NEW IN UPDATE: Switch to purple mode (lower right corner) and click the context button directly above it to enter Purple Mode! Instead of starting with a blank canvas to add or move buttons, Purple Mode fills the screen with exactly 420 buttons. Click on the buttons to dim and gradually remove them. 
 
In default mode, new buttons are added by clicking on the screen. In orange mode. the currently selected button can be moved. In yellow mode, the buttons clicked will be deleted. In green mode, a button can be promoted to green status or demoted back down to regular status. 
 
The game up can support up to 420 buttons on a single display screen.

Good Game Database

420 Button Clicker Achievements