COMPLETED THE GAME. Finally there's a duck!
But it wasn't very easy because of some Ducks bugs.
1. This game is cursed!! I just had to get 666 achievements after the game named me 'heretic'.
(If you mess with keys while interacting with the boat, it starts to increase achievements instead of money on interaction with bags (without removing them)).
2. while interacting with the 'shall not pass' sign, you still can use arrows to walk away. after that you can't remove the sign until you walk back blindly.
3. something with the coin bags. originally I think they gave 10 coins, but then they started to give 20. not sure why.
4. buttons on the right are totally not confusing. chalice one which is disabled (but it's not clear visually and there's no even any error sound) and the 'stop working' button which is of course the best button to press, especially in web.
5. trees are not interactive from the top, so the 'nOSE' challenge is little bit too inconvenient than it should be.