I collected all four piano keys (the smaller ones), but they don't correspond to the shapes of the slots where I should insert them. Precisely, I have two copies of just two shapes, rather than one copy of all four different shapes. So... I am stuck forever, I can't proceed. I'm curious: how could a bug this huge go unnoticed? I apologize if I am being too harsh, but, really, it is so evident that I genuinely suspect that the game was not tested even once. Maybe I am doing something wrong, maybe there is a...

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-option to adjust sensitivity -option to reduce graphics settings because game runs on 10 FPS on my system

試玩版，下載很快，4、5百mb的容量而已，進入遊戲後，打開選單看操控，發覺只能用鍵盤，然後選單介面 就當機了，有夠無言