hck210.pnghck_2_1_0 is an arcade game in which players have to remove all of the coloured blocks on screen before time runs out. This is accomplished by matching blocks with the colour of your ship. Match the wrong colour, and you'll be frozen in place for a few seconds as penalty.

Certain blocks have special properties, and when they are destroyed those properties are put into immediate effect. Clearing a spy block causes an enemy to appear and bounce around the screen. The laser blocks will fire a beam that immobilizes you if it hits, and locked blocks require a key to remove.

You can play hck_2_1_0 at this link (sound effects are loud, so you might want to turn down the volume first). The game features seven short stages to play through.