Algodoo

This buggy weighs at 120 kilos, has the correct engine speed and power, is the correct size, going by the internal meter stick, is four wheel drive, has nitrous, oh, and it has no springs in it at all.

Controls:
Left, down, and right keys: reverse, brake, and accelerate respectively.

Up and right at the same time: NNNAAAAWWWWWZZZZZZ!!1!11!1

Notes:
This was a result of about 18 hours of work, from chassis design up to final product. There's a ragdoll inside, as is customary with my designs. The whole vehicle is mid-engined high off the ground, so it's a really good idea to be extra cautious on the massive up-hill.

If the suspension is too stiff for your liking, then find the suspension blocks, and make them lighter. You'll know where they are. As foor the NAWZ, I only needed to use it on two occasions, on a part where the rear wheel fit perfectly in a little curl thing, and the massive uphill. I suggest you NAWZ your way all the way up the hill, you need the inertia to skip over the blocks.

Enjoy, and have phun, but do so carefully.