One of the main things it's lacking is "being able to lose" :-) ... the idea is that the enemies will crawl on the walls around the crystals, and be electrified. If you zap them with your laser, they will "pillbug" and bounce around, but leave behind a "fuel cell" for your jetpack (which will run out of fuel). There are also plans for a "boss monster" type critter, and critters which "eat" the pillbugs and eject crystals. The game is far from done, and we're not giving up on it!