Really liked it. Great models and sound that all share a uniform style, and just the right amount of lights and effects to be cool without being distracting. If I had to give some advice it would be to make it simpler ("do touch this type, don't touch this type"). Or increase complexity slightly at each stage, rather than all at once before first level.
I would also reduce the amount of text at the start. A lot of people will skip something that long, so maybe just try to get the main points in a shorter space? You could always include everything in a "Learn" or "Tutorial" screen.
But I'm nit-picking - this is great. Congrats!