If that version is the same as one I saw a few years ago then it's cpu speed dependent and it's pointless to try and compare times (the game is much easier on slower machines).
Hmm. Having tried this at my computer at work and averaging around 11 seconds, I was very surprised to double that time on my (much faster) PC at home. Conclusion: if you've got a crappy mouse, you're not going to get a very high score no matter how good your reflexes.
30.87 seconds. Upper-left corner is dead safe from 2 to 14 seconds...you can traverse the black border safely by clicking the side/diagonal of the block nearest the edge, recentering outside of field of play. Doesn't keep the blue blocks from barging in, though.