I watched the walktrough, and there the objects seem to be moving faster, so I think that my computer/connection may be slower, which causes the objects to move slower, which makes it (nearly) impossible to get stars in any level, I've only managed to get the star in lvl 6 with just 1 second left, and it was pure luck, even the very first levels were impossible, because it just wasn't moving fast enough to get it in time, because you didn't think of that, I'll deduct 1 star, the music was annoying, but there was a mute button, so it'll cost you only half a star instead of 1 for the music
other than that pretty good game, challenging , but not impossible to solve (though impossible to solve within startime, for slower connections/computers) so 3.5 stars!