I would:

• Buy a FU environment Car, and use 100% of the speedometer because I paid for it.
• Buy a FU sized house, and fill it full of ballpit balls, cocaine and hookers.
• Buy a FU size music venue, pay U2 to play at the venue, give free entry to everyone and arm them all with 4 cartons of eggs each.
• Throw a massive FU party on the biggest ocean cruiser, invite only the top 10% of richest people. Then scuttle the thing.

Do I have any money left?

• 50% goes to developing Australia.
• 25% goes to the Linux foundation.
• 20% goes to whoever is still alive in my family.
• 5% goes to lizards on the internet, because frankly, the cats are getting too much attention and they are wayyy overrated.

Build my dream house with an architect. After that I would probably travel the world with friends and family.

I'd buy an old Land Rover series 2 or old Land Cruiser and drive around the high desert looking for shiny rocks.