Interesting use of light as a core mechanic. The story feels a bit forced, though, and there are many things that are unintuitive and lack helpful feedback. For example, there's a limited flame, but there's no indication of how much flame you have left. Robots don't make it clear why they act the way they do, and while using limited light is unusual and interesting, the challenge is from being sorely inconvenienced. This is a wonderful demonstration of the kind of power that can be accomplished with Unity.
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Professional review!