play in simple mode at least once (click difficulty icon top left) choose simple.
use Undo at least once
use the hammer at least once
use vertical line at least once
check game settings and click on more button to see more of our enjoyable games
unlock and play in black theme at least once
unlock and play in light theme at least once
unlock and play in white theme at least once
unlock and play in orange theme at least once
unlock and play in teal theme at least once
unlock and play in dark blue theme at least once
unlock and play in dark purple theme at least once
use clear same number tool at least once