The graphics are really good! The pixel art style is cute and works well, and the designs of the main character and the enemies are especially good. I think the flashlight mechanic is really solid, and this works really well as a standalone game.
On things that could be improved, a little more feedback upon losing, like a death screen and an instruction on how to restart, would be helpful. It also looks like battery drains based on how long you click rather than at a fixed amount dropping at each click; I think this could lead to an unintentional higher difficulty for players who have slower reflexes. It's also a little hard to dodge the monsters in the second level; I think having to avoid them when you're out of power gives the game some nice tension, and I actually enjoyed having to run away from them and recoup, but it can feel unfair when three monsters are circled around a battery recharge. I died pretty often to those parts. Maybe if the flashlight recharged battery slowly over time, it would give players an alternative strategy to use if they're not quick enough to run in and grab the battery recharges.