Admin, I don't suppose there's any chance you could dig up the old game Frogger for the arcade??!! It was one of my favourite games on the old BBC Basic. You basically have to get the frog across the roads and river, avoiding various hazards along the way - but I'm sure you know that. It'd bring back some fond memories!
I've played a few awful games of frogger on forums in my time, so I'll go see what I can dig up, must be some better versions about now. Might as well make the 100th game in the arcade a classic. Good shout.
I've never found a decent space invaders flash game. We have one by default here. Give me a link and I can always take a look.