I liked the dialogue and existential nature of the game, it reminds me a lot of Thomas Was Alone. The music also gave the game a dreary atmosphere. However, I didn't feel very invested in the cube character. I was able to progress through some sections so quickly at times that it was easy to miss the dialogue. I wish the game play was a bit more engaging so I felt more motivated to continue playing. I think you have a decent foundation, it just needs some more fine tuning!