Can anyone tell me what happens when you complete all mission stages and you become an Admiral? I've come frustratingly, tantalizingly, agonizingly close so many times I think i may be losing my mind.

You start again. This time the colouring in of each section is yellow (instead of the green, blue etc).

The mission stages get no harder than trying to get admiral although you less likely (it seems ) to get a mission that doesn't involve two parts or more than just the simple ones.

Once you complete them again it just goes round again - but I didn't find out what colour came after yellow as I stopped playing.

Oh you don't get any extra life at 50 or 60 million.

have fun