So yeah I completed the game :D
And what can I say... it was amazing. Challenging puzzles, interesting story and multiple endings (3 done, 2 more to go). On my first try I got Oxalis and D rank D:
5 stars. By the way another question for the puzzle:
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Last part of the game, that one with shadows where you had to put statues and light. There were 3 shapes that translated to the code -045.
One is missing. How do I know the first digit?