I need a characters design

Information for the business: We create games
Industry: Entertainment
Design details: == Description ==

I need to create some characters for my next game. They are an Alien family, I will give you the detailed story if we start work together. Also I have some details about what feeling they should transmit.

I'm looking for creative designers to help me create this characters.

At the beginning I'm just looking the the right style, the idea is to get sketches from different designers. When find the correct style, the idea is to continue making the graphics for the full game (backgrounds, game elements, interfaces).


== What do you have to do? ==

Create each character, they are 4: father, mother, kid and girl.

Then you should send me the sketches.


== Technical requirements ==

- The characters should be similar to balls. (they will bounce)
- The drawings should be very simple, without many colors and details. (check ref)
- Must be simple to add expressions to the characters
- The characters will be animated, take this on your mind

Please feel free to write me if your have any question.

I hope to work with you!
Target audience: all ages
Ideas for the visual style: The style should be similar to angry birds and cut the rope, simple vector graphics.
Extra notes: