It's mostly based on Japanese since that's what I was studying during my free time, but 心 can mean heart and/or mind, as Kanji can have multiple meanings. I suppose the energy could be represented as both physical or mental health, but either way that feature has not been implemented yet. I may use a different engine in the future if I still can't figure the health system out yet, and the game could look completely different than this one demo does, I'll probably move the double death block gap to a much later part of the game for example. Thanks for commenting!