I thought it was a really clever way to "teach" you about the game without having an actual tutorial (which I personally always hate). I especially like how it

I thought it was a really clever way to "teach" you about the game without having an actual tutorial (which I personally always hate). I especially like how it lets you build up enough of a score before introducing the red block so that if you hit it a few times you are still in the game and the only setback was some time! I think with some additional effects on the score (like some red flashing and showing it remove the score) when hitting a red one and it would be a lot easier to understand very quickly that it's bad.