The concept is very interesting. Even if you have only four movements it's not easy and immediate to complete the puzzle. You have to think how to place the notes according to the movement of the duck. It's not so obvious when the diffcult is increased with the double notes and new movements of the platform.
The interation at the beggining of the game with the letter is interesting and original. I loved it.
Sometimes there are some bugs. Sometimes it was difficult to catch the notes. It can happen that when the drawer closes the notes fall out and you can't play. You have to exit and reopen the game. This happened to me twice.
The game is very enjoyable! :)