| Up/Down or W/S | Move block up or down |
| Left or A | Move block to left |
| Right or D | Rotate block values |
| Enter or R | Fire a bomb (you get bombs after 3 levels) |
| Backspace | Toggle move method (single-step or fluent) |
| P or Q | Pause |
| V | Validate highscore |
| F12 | Reset Game |
| Esc | Exit Xen |
When the game ends you get your highscore and a verification code (click the screen to copy). This code you can post in any forum or send it to your friends to show them your score.
To check if a highscore is valid copy the code and run Xen.exe - a message box will ask you wheter to check the code or not. If Xen is already running you can press the V key (the game pauses) and enter the verification code directly.