The game is gorgeous loooking, I have to say it's a bit strange that the background is kinda compressed, blurry or low res compared to the character and the blocks and if you decide to fix it, you can add "parallax effect", it's the ilusion of 3d that you can do with moving the backgrounds so it matches on how it would do in real life, I can see being used and look even better.
I cannot progress the game since it cannot detach the soul from the golem, I'm stuck at the second level. I'm using the keyboard controls, I have read the controls and you have it configured to be Q / D for movement and A for spliting and reuniting the soul with the golem, but that doesn't happen, instead I have the A and D for moving left and right, and space for jumping (Maybe you didn't configured properly the Input manager axes characteristics, you can find in the top Edit > Project Settings (which is near the end of the list) > Input Manager > Axes).
It's sad that I cannot play it whether it's an error build or you didn't configure it properly for keyboard control, because the game looks good in the screenshots, hope you can fix it and I wish a happy game development journey!