The sounds like a problem of lag (the timer on your computer running slower than the timer on the server).

Try turning all the in-game options to their lowest values, and see if that helps.
Also be aware that switching to other pages while in game will slow your timer, but the server timer continues at normal speed.

Running other programs at the same time can also slow your computer, and make this problem worse.

H'mm, I still can't see what else it could be other than a lag issue.

How is your internet speed?
Is your computer relatively fast, browser and flash up to date etc.?

And is it the latest version of supermechs you're playing (should say 'ver 2.5B in the bottom right of the loading screen)?

I got a question, do you have wi-fi or cable connection?
If wi-fi, try using cable connection and see if it makes any difference.

Btw, your computer is fast enough to run Flash games just fine. I'm quite sure other flash games won't "lag" as much or at all if you play those.

Though, there is also a possibility that you can't do nothing from your end. My 1st reply in THIS topic explains what i mean.

Edit:
You could also try and play via direct link to see if it helps.
I use v2.2J at Funny-Games.biz direct link
Or you can try the v2.5B from official site direct link

--
Aeacus