First big update (build 8.0)

Content

1. Added multiplayer and one level for him(test)

2. Added tutorial

3. Changed control cars, now cars are more stable

4. Added ship of the aggressors (only in single player now)

5. Added system of checkpoints

https://youtu.be/Q7v928SXAgg

Many bugs fixed. Ship the aggressors in multiplayer, and the story will be in next update