If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Z - jump.
X - door & switches.
You are an individual with a mind of your own, goals and ambitions. Now go jump on that pile of corpses so we can make a bridge. Use your wits and your expendability to progress through rooms filled with spikes, circular saws, networked cloning pods, and of course, sequence puzzles involving switches in this oddly green-around-the-gills platforming adventure.