I liked how the radius of vision was proportional to level of battery charge, that is very nice idea. The energy drained maybe a bit to fast to do something, my personal best was just short of 1 minute (59 seconds I think) after few tries. For the vision/flashlight (which together with shrinking made the game very unforgiving any smallest mistake or even some procedurally generated worlds when I had little luck) you may consider logarithmic or other non-linear shrinking (so the field of vision would shrink slowly with higher charges and fast with near empty battery), that would make it easier to play I think (unless doing something veeeery hard was your plan). I had my fun, played few times :) You could place the controls instructions on the itch page with game itself, not only here in the description of your entry (as more people tend to look there than here for instructions).