Designer needed for Android app Logo and Promo Graphics

Closed - This job posting has been filled and work has been completed.

Job Description

We need some graphics assets designed for our Educational Android app. Examples of what other people have done can be viewed on Google's store:

Here is our app:
And here are the needed assets in pixels:

Feature Graphic: 1024 w x 500 h
Promo Graphic 180 w x 120 h
Large Icon: 512 x 512
Launcher Icons:

We are open to either Photoshop or Illustrator but having the assets in vector format is obviously better.

Skills: vector-graphics, scalable-vector-graphics, graphics, drawing