Road updates:
- Road segments now have different friction coefficients
- You can set the range of acceptable values for friction in the settings
- You can enable/disable gradual changes in road roughness or friction with distance
Cars updates:
- You can now set the engine power and density of the car
- It is now possible to launch saved cars on the road
- Now it is possible to cross saved cars
Other updates:
- Added a manager for custom configurations
- Updated the design of the main menu

Added:
- tutorial
- new eye style
- new control option

Some bugs fixed