Recently came across this really fun flash game, best one I have played in a long long time actually. Give it a go and see what level you can get up to.
http://www.eyezmaze.com/tontie/v1/index.html
Warning: This game may cause a severe mental addiction.
I so can't get any further than that though no matter how many continues i have rocked up, it's just fucking impossible I swear. Anyone who can pass it is a god.