Simple? Open source? Javascript.

Next would be Flash, but since you're asking for open source and free, try Swish.

You could also learn Java (not -script) but this requires the users allow Java applets, something many will not. But if they are looking for games, they might.

Let us know when you hit your first mil. :-)

Not really aimed at people LOOKING for games. More like there's a cool game that they never knew they were going to find. So cool they want to forward it on to their pals... = me = millionaire!

But seriously, thanks for tip. Will look at Swish and let you know re. the million... hell, BILLION :-)

Looking at Swish it looks like you pay, rather than open source.

Am I missing something?