Studio 2 Week 7 WIP

Based on the feedback from last week, I made some changes:

1. Every interactive element currently follows the visual standard that with a outline, the ground tiles have a bright layer besides on it.

2. Change the way of shading from controling attribute of renderers to manipulating the color attribute of global light so I can change the color  theme of space dynamically from a higher hierarchy.

3. The swinging control have a tangent force now which makes the acceleration of the swing easier to handle.( Compared with the horizontal force for last iteration) Which solved the problem that players feel it weak when swing to a higher place.