Enhance 2D Unity Game Map

I have a complete 2D game built in Unity and now it’s time to breathe more life into the world it takes place in. The current map works mechanically, but visually it feels sparse and the layout could give players more to discover and interact with... (Budget: £20 - £250 GBP, Jobs: 2D Animation, 2D Game Art, Game Design, Game Development, iPhone, Mobile App Development, Unity, Unity 3D)