Recently, I downloaded the Containment Cube Arena from Click's website for my DSL2.1. I think I've installed it correctly, but for some reason, it's not working- to elaborate, the screen goes black (with the cursor still there), and after a few seconds, I can hear crowd noises, and when I press the control keys for the robot I'm playing as, I can hear them. Nothing happens after that, and all I can do is CTRL ALT + DEL to get out of the game.
I don't know what's gone wrong, so some help here would be greatly appreciated.