The game begins with the question: Do you want to play the Advanced game? If you answer Y you're then asked for the password, which of course you don't know unless you got it by playing sufficiently well at the non-advanced game.
This latter is slow to start, although the graphics are quite good and colourful. You guide your frog across a busy road, followed by splash-free guidance across a river via logs/barges/etc. The occasional crocodile may be thrown in for good measure.
Time is a factor, displayed via a shortening red line, while you attempt to steer your frog across to the opposite river-bank.
You have four 'lives' and once you get the hang of it, it can be quite good fun.