Here are some vectors I have been working on to put within my app:

Above here is my adapted Captain Morgan logo.  I have traced the logo in Illustrator and then set the colour to black.  I have used the pencil tool to to aimlessly stagger across the letters to make a shape. I then used the PathFinder tool to merge this to the letters creating separate shapes.  I used a dark red colour to fill this in with to create a blood type of effect.  I did this because the red colour is part of Captain Morgan's brand and since my app is to do with battles and fighting enemies this seemed a good thing to do.

Above here is a start to my pirate ship which will be at the start of my start up screen for my app.  I had no idea how to go with it so I created 2 circles one larger than the other to create perspective and went from there.  I had a picture of a ship next to me so I used the pen tool to create the basic structure of the boat.  As you can see the front of the ship is facing left.  

I then went on to create sails using a light cream colour instead of white to show up and stand out.  I also used a black stroke so they did not get lost within the app or image itself.

This is my finished pirate ship.  I am pleased with the outcome as I generally did not know how it would turn out like.

After every level for any game app you may get a score, a rating and any other bonuses you collected along the way.  With this in mind I created a similar type above here.  I used the font 'SimpleNails' for the congratulations type as it looks traditional and inviting.  In this the bottle will spin round depending how many bottles you collect over the different levels.  The next level button will then appear.

  

Using my chosen theme and time era I created a scroll in Illustrator.  I just drew a swirl shape and used the 3D Extrude & Bevel effect to create this.  As you can see I have placed the content within it and this will act as the the scoring etc after every level.