It looks simple. Too simple. And then you get to the second stage.

A very good take on an ancient puzzle gameplay, you just need to slide the red bar (your car) out of the screen (representing a parking lot) by moving the other bars around. Sounds easy?
Yeah, easy to lose track of what you're doing! Oh, and you'll quickly get portals that you'll need to use to navigate all these cars...

The only "negative" thing is that there is no music, but it's really nitpicking. The concept is super simple yet super effective, and it works so well at making my brain overheat.