Wow.. I finally got to play it and holy crap that was way more addicting than I'd like to admit. It took me around 20 tries to finally get it but I found an easy way to break the system ;)
All it needs is some polish and this could be a solid minigame/microgame.
I'd add some beeps when running low on energy because sometimes it was hard to manage items and the energy. But maybe that was the charm. Well done.