(Taken from Jay is Games.)
"Here is one of my all-time favorites and it will surely be one of your favorites, too: ZomboCom. Actually there is no other place quite like it that I know of. It's unique, it's original, and it's one-of-a-kind; truly a rare swedish fish in a sea of jujubes.
I love it because I feel welcome at ZomboCom, and it's a feeling that cannot easily be replicated. If I am limited by anything at ZomboCom, it is myself. The best part about it is anything is possible at ZomboCom and there is nothing I cannot do.
So won't you join me? The unattainable is unknown ...at ZomboCom."
Linky:
http://zombo.com/Really fun, and challenging.
EDIT:
Whoops, forgot to post help for getting started.
Look at the colour of the letters and note the sequence. Now replicate the sequence on the flashing lights. The game doesn't give any feedback at this stage, which I think probably discourages lots of people from going further, but if you persevere, the next few levels are worth the effort.