Yeah! Solved!
It's not easy to understand all the numerous rules at first. But in the end, it is very logical. I had to try myself, to understand a few elements before going back to read the rules which were much clearer afterwards. Not being able to exceed the required number of each number eluded me at first, as well as having to use all the tiles. But as soon as understood, it was a pleasure to find the ideal order, and to validate it to open the drawer ^_^ Congratulations for this game which must have asked a lot in recognition of tile layout in order to write the right message of error every time. Very smart puzzle and ... mysterious ^_^ And I loved the cat sounds ! Miaou !