Rovio, youve made another great game. I love building and designing machines, and I love water rockets, so this is pretty much the dream game for me. $4.99 was a fair price. It took a little while to figure out the trackpad zoom, but it certainly works. Only recommendation: game center, which Im sure youll add in future updates. 10x better than Angry Birds! 1 month later: WHERE THE HECK IS THE UPDATE, ROVIO???!!! 2 months later: Updated, finally, with new episode. THANKS SO MUCH 4 FIELD OF DREAMS 4 FREE!!! Btw wheres Game Center?