If things aren’t going your way, no worries! If playing on TV you can restart the round via the in-game Settings by selecting “Restart.” You can access settings by pressing Esc while playing with a keyboard and mouse or, if playing with a controller, tap the Settings (☰) button on top right.
In the mobile version, to restart the round, look for the cogwheel (⚙) icon in the upper right corner of the screen and press the restart button.
This action can’t be undone and will clear all progress from your current round, sending you back to the beginning of the first stage.