I loved the art style, The combat system was a bit jank though, also the puzzle was not self explanatory enough, and required a bit more help, i had to look at Avtor1tet_27's review to get past it,  Overall  pretty neat game!

If you can't pass level 3, then here's the answer (if you haven't tried it yet, then don't read this!)

You need to press three parts of the key (counting from the wrench on the left) and play the melody by pressing alternately 1 2 3 2

wow, that’s amazing game!