I don't support this idea, though the game doesn't run at full speed on my PC (Pentium 4 3.0 GHz, 1.5 GB RAM); and I agree that there could be a light version (besides lowering the .swf quality) that makes it run smoother and faster on slowrer PC's.
How to do it? I 've no idea what it is that makes it run slowe or anything i just know that it does. I 've tryed modifying tons of configurations settings, but nothings seems to deal with it:
Allowing to use hard disk space to store data (right click> configuration)
Closing all other unnecesary programs (either use bandwith or CPU or RAM)
Always play on low quality (Settins> quality)
Adobe flash updated to v10
Tryed it on Chrome and Firefox; and both in Windows XP SP3 and Ubuntu 9.04; it run similar in all.
Also tryed it on a faster computer, my brothers, I don't the specific configuration but I remember: duo core, 4 GB ram, Window 7