Okay this game is incredible! I got strong Portal and Antichamber vibes (both of which are games I love). The cube splitting mechanic looks so good and is a really satisfying puzzle solving mechanic. I can tell a lot of work went into it. It also matches the theme of the jam really well. The narration is well done too.
I could see this becoming a full game if you decide to keep developing it. I would definitely play more of this.