Exit the room you start in to reach a dock with a small boat, jump into it and shoot the mooring line to start floating downstream. Eventually you’ll reach a dock with a windmill nearby. Get out of the boat and walk in through the windmills side entrance. Watch out for an Eightball equipped Skaarj lurking in the basement. Kill it and collect the ammo scattered throughout. When you’re ready exit the windmill and go through an archway into a small graveyard. Kill the Skaarj playing dead and pass through another archway to enter the next level.