Yeah, a tutorial level would have been great. Actually, I kinda tried to make a very limited 'hideous' tutorial (tutorial that's not apparent but still helps the player in figuring out the game) because I don't like the idea of having an obvious tutorial (not sure if that makes sense). That was very limited in nature tho. Basically, in the start screen, you must swipe to toggle music or sound or play the game (3 directional swipes; I did add a brief animation for that tho) rather than tapping the buttons. The game that happens after it uses the exact same controls as well along with the same white colored indicators.
What you are doing is awesome, you know. It helps us and you too! IMO, it is a sure way to understand and get better at making games. :D