It's quite playable

It's good for playing without thinking too much. However, there are ads after clearing. But they aren't that long, so they're watchable. You have to pay to remove ads, but I don't really feel the need to do that. The rules are surprisingly simple, so you can play easily. It's also good for killing time. A little tip? After a few rounds, cars with a question mark appear. That's a system where the color is revealed if you remove the car in front of it, so it's easier to play if you focus on removing the ones in front of the question marks first.