Algodoo

Nice job overall!

Suggestion: The only negative that I see is that you require users to alter the spring constant in order to increase or decrease the throttle. It's never a good idea to require the user to enter the "script menu" to change parameters. The throttle and any other parameter change should be done either through the keyboard or via clickable buttons in the scene.

Awesome work on the truck!
In regards of what to improve, my suggestion is also similar to Xray's.
I think the throttle is best done through keyboards/etc. Using a spring constant slider to adjust the throttle input can be a little awkward sometimes.

But other than that, you've done an amazing job on the scene, I'll rate this a 10/10

Thanks guys! I've been trying for a long time to make engines with throttle keys, either moving the springs (like in some old scenes from Toni) to spawn engines but I've failed each time x_x

I've been wanting to try something with coding, I'm pretty sure there is some way to code this, but I have no idea about Thyme nor where to learn it either

I'll keep trying with the moving springs throttle! but I cannot assure if I'll success

what I think about the code is that it could add and subtract an amount of spring constant when pressing two respective keys, having two limits (minimum and maximum)

atlhough I think this would be inefficient and hard to do without some kind of scene.my ... who am I kidding, I really don't have idea about coding

I'll stick to trying the spring mover mechanism