I was never a fan of this kind of games but tried it out and I have to say that it is more addictive than I initially thought. Tutorial is so awesome. I love the fade effect and transition animations. The game is so simple that is very enjoyable. Tested the web and iOS version and I'm glad you don't ask about any permissions, you don't require registration and you used simple subtle sound effects. I really like it. I believe you will gain a lot of users/customers. :) Congrats the awesome product!