Generous feedback! Thank you!
I realize the difficulty is putting a ceiling on the player engagement so I will tune it for following versions of the game. Adding a savestate, progress-based "Level select" in Main Menu, adjusting the energy system a bit to ensure more free exploration.
I've also recorded a quick gameplay trailer where towards the end you can get a glimpse of one of the game's endings: https://youtu.be/Xyn9pxYq420?si=wHACGfk2WlxMtaWA