[2500] The Hole

Science Fiction

This is a short story that I wrote for an informal competition. It didn't get selected, and I didn't receive any critique. One issue I have with it is the ending: the competition was limited to 2500 words, and I ended up ending abruptly. I like some of the concepts in this story, so I'm thinking about expanding it a little and fleshing out the ending.

So, with the understanding that the ending needs work, what else can I improve with this story?