Pleasure
A good place is one in which it feels good to stay in. It motivates us to be curious, explore its nooks and crannies, and remember it fondly.
<aside> 🛋️ Exploration
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Design the level so that people feel motivated to stray off the critical path.
<aside> 🛋️ Comfort
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Design it so that people can intuitively understand it and navigate around without thinking about it being a challenge. Do the opposite if that is the design objective.
<aside> 🛋️ Play spaces
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Let players fool around and have fun independant of the mission objective. Design some spaces to encourage trial and error, where they can express themselves without thinking about time or ressources.