Nice however i noticed two little problems:
- there's a big fps drop (about 1~2 sec) just after the loading screen
- the car's turning is very, very wild. too wild maybe ?

The fps drop seems to last about 1 second, I just tested it on mac, but i'm not sure what I could do about that, as it's probably the size of the level and all the objects it has to load i'm guessing.
As for the turning I know what you mean. The turning used to be too slow, so I made it faster but maybe too fast, ill try tweaking that sometime.

In that testing I noticed another bug with challenge 3, the objects are there before the challenge is started. I remember this as a bug where I would try to deactivate them in the editor, and the editor would crash. However I thought I put in some temporary script to stop that, perhaps not. Will try to fix in the next version.

Lots has changed since my last post, the challenges are fully working now. It is Christmas themed for the moment.

And... A day/night cycle!

Using translate, the light moves across the scene and when it passes a certain point it returns back to the start for a nice sunrise.
And naturally the car needed headlights to fit the darkness at night. (The screenshot is not actually at night)

I also added two more cameras, one on a wheel and another 'inside' the car.


Also, I think I have found how to fix the 'invisible walls' problem. Changing the wheels to a sphere shape seems to make the car a lot more stable.

I saw that you use the box mesh a lot,
to have a more precise collision for the ground, try to make a mesh in blender that is subdivided to not have too large triangles, and in Maratis, use the "triangle-mesh" collision type instead of "box".

Never did 3D vehicle collision though, so no flips for me.

Looks amazingly fun to play with Keep up the great work