I found your game just browsing itch. I know it was released a year ago but I still really like how the artstyle has a lot of clarity in being able to see what is going on. It has its charm in that regard. I think this game could benefit from post-processing effects like Bloom due to the usage of white colors a lot in a dark void. I found in my experience that bloom helps make those colors more crisp in a game like this.
I think gameplay wise I do like how responsive everything feels. I do wish the player speed is faster though especially because moving from room to room feels a bit slow but I do like the transition effect between rooms.
I would probably also make the Energy attract to the player too (similar to other games that have orbs that just go to you) to make the game feel faster and more alive. The game does do a good job teaching you the basics of how to play though :D
You also seem to have have an intuitive idea of how to create silhouettes that are very readable in gameplay and know how to use the right colors for clarity. While the graphics are blend they are functional which makes the game very playable and I do appreciate that a lot.