The tutorial would probably be nicer if it were more interactive earlier on, and this would allow you to ramp up players at the same time.<p>Explain shape matching, and show some example combos, but then dive straight into playing a quick round where the only thing you have to match is shapes. Perhaps use less bins so it's not too easy, and set a lowish target amount of points to move on, say 10 or 15.<p>Increase difficulty by adding more parameters, I would add colour first, balancing a quick reward cycle with the more complex gameplay.<p>On the tutorial, with the animations you currently have you definitely need a way to let players skip them. I wanted to quit the tutorial half way through because I already understood it, and the three animations are identical once you know the idea. I was getting frustrated by the tutorial before I got to even touch the game.<p>All in all an interesting diversion, thanks!