I need a professional graphics designer for a 2D mobile game

Design details: I am looking for an experienced designer who can create graphics for games.

The project I am working on is a 2D platformer style mobile game that will teach kids how to program.

I need a designer who can create colourful and professional looking levels, sprite animations for the main character and beautiful backgrounds. I also need help with the user interface ( buttons, menus, etc. ) and the logo of the game.
I imagine the style of the graphics to be somewhat similar to the game "Snakebird". However, that is not mandatory. If you are thinking of another unique graphics style, I'd be happy to see it.

Please, send me your portfolio of work that is relevant to this project. ( 2D graphics for mobile games )
Include the word "codegame" in your proposal so I know that you have read this.
I will pay hourly for the job so send me your proposal with your hourly rate. If possible, include a time estimate of a simple logo for the game ( the game will be called "Code adventures" ).

Thank you for your time!
Ideas for the visual style: Any style will be accepted
Urls to draw inspiration from: https://www.google.bg/search?q=snakebird&client=firefox-b&biw=1536&bih=755&source=lnms&tbm=isch&sa=X&ved=0ahUKEwifmLnX-6rQAhWFPhQKHcn2D2IQ_AUICCgB
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