Hahaha. I'm surprised to see this on Steam, considering it was originally a little in-browser thing. It's an amusing little waste of time, probably won't hold your attention for too long. Go ahead and check it out.

Short and sweet. My personal experience was that many of the puzzles were a breeze while just a few managed to stump me (yet having a solution that seemed obvious in retrospect).

Honestly though I would have enjoyed it even if all of the puzzles had been too easy, simply because it was like watching a 3-hour long Grickle animation. Not familiar with Grickle? Proceed to google and or youtube immediately.

If your initial impression of Cargo! is that it seems, shall we say, "unrefined", then you should see the vehicle sections. A short ways into the game they introduce a system that lets you piece together your own vehicles with freedom akin to playing with a lego set, and then (assuming you make something at all functional) you use those vehicles, which you can alter, dismantle, and rebuild on the fly, to accomplish the majority of the tasks from that point forward.

On top of that... the game has a real "they must have been on some STRONG stuff" feeling to it. The developers swear they weren't, but... well, take a look and you'll see. Surprisingly entertaining.