Dave Bonta gives us a very small scene: a person sitting alone at night, a model ship nearby, and a moth. That's all, yet the poem turns quickly toward something large. The speaker admits to a fear of death, and says it troubles them until daylight.
The setting does a lot of the work. A model ship is a tiny, fixed version of something meant to travel, so it hints at journeys and perhaps at the passing of a life. The moth, small and fragile, shares the room with the speaker. Moths are often drawn to light and are easily lost, and the poem seems to let that fragility mirror the speaker's own. That link is an inference, since the poem never spells it out.
The mood is quiet, lonely and uneasy, but not melodramatic. The short lines and plain wording make the fear feel honest, like a thought that arrives in the small hours. The last line offers a gentle relief: the fear lasts only "till daylight."