I agree about the main mechanic. It ended up being more frustrating non-intuitive than fun non-intuitive.
I mean, the mechanic itself is fine, but using it in dark caves (in which you have to react quickly to enemies and water droplets), while also having to manage energy was just a less than ideal fit.
I would love to see this mechanic in a slightly slower game and full visibility. Either way, I think it was a very interesting game.