Wow, I am so glad to hear that someone played my first game!!!! Honestly say, I felt I should had done more things. And the playability didn't reach my expectation. The fact itself have got me down and I don't want to see my page after submitting. But when I saw your comment, my motivation have been reactivated! Yeah, the piano sound might be too low, I may fix the issue. When you get the level 5, you should avoid bunch of trains.
I very thank you for playing!