This is clearly a rushed product, but I wouldn't say it's incomplete because the game showed a lot of competence and had an ending.
The light system is the biggest draw of the game, it's super smooth and it provides some very good scares because the player's vision is always somewhat obscured. I do think the battery system is kind if pointless since it doesn't work, even if it did, it might potentially undo a lot of the scares in the game.