Starting in version 1.2.2, you can use the “Unlock All Modes” option in the settings menu to unlock the first level of the “Add”, “Connect” and “Multiply” levels. You can open the settings menu by tapping the screen once to bring up the settings button (a gear shaped icon) in the top left corner. Tap the settings button and then tap on “Unlock All Modes” near the bottom left of your screen.