To navigate the menu, use the arrow keys or the mouse.
Select [Easy mode] or [Hard mode]
Select [Relative Keyboard], [Absolute Keyboard], or [Mouse Movement]
Click or press enter on the button showing a mouse click and an enter key being pressed to begin.
The last two buttons can be clicked/used with the enter key to display the easy mode and hard mode high score tables.
The high score table menu can be navigated in the same way as the main menu.
Center-row buttons are Daily, Weekly, and All-Time high scores, respectively.
To return to the main menu, click or use enter on the final button.
High Score submission is somewhat broken for the current version of the game--if your internet connection fails to submit the score, there is no second chance. Sorry to anyone whose high score is lost due to this bug!