Nice game...
This game is pretty darn addictive despite the small amounts of programming in it. That was pretty impressive how you could put such little things together and make a great game! The increasing difficulty only made me want to play longer so I could beat this. Nevertheless, I still have to say I am impressed by this game. It was so simple--yet so ingenius--I wish I would have made it myself. Since this is just a dema, I'm gonna give you a 6 for now. But I'll keep an eye out for the full version and make sure it gets the score it deserves!
Great job overall!