A 3/5 is a good rating in my mind. The game feels kind of difficult. You don't get a lot of open space early on, but still, it plays correctly, and looks professional. Good thing I'm not a truck driver!
The platforming is completely solid. I'd recommend developing the backgrounds some more. Put a plot in, use a cohesive art style, and you'll have a great production, even for posterity.
It took getting used to, but it's fun like you promised.
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