Physics Spark - Basic physics

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This release is a major release and the name of the app changed into Bright Spark. Here are some highlighted features that exist in this release:
- New and efficient UI and UX design
- Decrease the size of app
- Added the national rank section to see the rank of your country
- Added the feed section to show the latest news and challenges to the users
- Capabilities of seeing more courses in the close future
- Bug fixed
- Game deleted