Every time a specific laser fires (just one, not the others) my character jumps to the extreme right of the screen, and this is quite annoying. My rating drops from 3/5 to 2/5 until this is fixed.
Anyway, buy as much elevators as you can, put 2 machine guns and a laser in everyone, update machine guns and you'll survive.
Remove the right-clicking issue and this game will become more interesting.
Apart from that, don't you guys have the feeling you already heard the soundtrack? :S
Sometimes you lost some orders, so you can't finish the levels and have to refresh the page, since people stand there like stuck, and you can't kick them out.
Repetitive, unoriginal, with 5s of music that loops again and again. I think this game has a rating 1 whole point higher than it deserves. I give it 3/5.
You know? I didn't expect an enjoyable game, but actually it's not so bad. You can improve it by adjusting the speed of the falling diamonds and by removing the small delay between the end of the tube and the red/blue rectangle (it's not easy to deliver a blue-then-red combo).