The game feels very unfinished and not player-friendly. I understand it being a prototype but demonstrating how to put the blocks and other mechanics is important to a seamless play experience. Also when the main character talked before the corridor you kept switching between his "???" and "Kadena", when you were talking to the other NPCs. I think in the intro cutscene where his name is established to the audience you should keep his name "Kadena" from now on.