I admit that I am not much of a fan of puzzle games. No, I'm not stupid, it's just not the kind of games I'm good at. I was quite relieved at how utterly simple this was. On the first level, I didn't even get the right combination and I advanced! Probably just something for that level. On the following levels, I managed to do well and even when I messed up, it didn't end the level!
That being said, it was probably too easy. There wasn't that much in terms of graphics, but I doubt that was the point. I assume if you don't get it done quickly, you get fewer points. It did in fact remind me of a slots casino game and I am no gambler. Of course, I probably would gamble with this.