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My suggestion here is to make that the doors' triggers are a click and drag, and not just a click, so you can open the door how much you want, and...
Add mileage, like an UI, that shows all the distance you have driven (Km or miles) that you have driven in all the time, the distance you have...
I think it would be cool, if its not asking much, realistic water, like, water doesnt automatically flood the entire car, if you take out a car...
I would like to suggest the idea of having functional hands in the walking mode For example, the box in the door handle only opens the door, so...
