Thought I'd share some amazing 2D artwork available from a group that goes by the quirky name "Alien Nude". Their work is absolutely amazing. You can find it in the Unity Asset Store here.
Each pack consists of a large number of backgrounds and set pieces. These could be used as the environment for a platformer game, or as the background for many other types of 2D games. In Mini Micro, you could arrange these in several display layers, and then scroll those at different rates for a beautiful parallax effect. Here's one example of a scene put together from parts in the Underwater Pack:
These are being sold through the Unity Asset Store, but would work just fine in Mini Micro too. If you're looking to develop a professional-quality game, artwork like this would be a great start!
(I'm not affiliated with these guys and get no kick-back... I just stumbled across this today and was impressed.)
