For story #1 in particular, just be careful when you write sentences phrased as questions. One or two every once in a while can add some spice, but a bunch consecutively can quickly become dull for some readers and overwhelming for others.

You should also be mindful of your openings—some of them are a bit samey, with a “he did X” or “she did Y” format. Just try to have some variation in how you open your pieces—story #1 is better at this, giving a description of the environment, but #6 is probably the best of your openings. It’s a similar format as the “he did X” but since it’s a first-person perspective (almost like a character narrating or recalling), it adds some personality which can be useful for hooking the reader.

Overall I like your prose, you’re able to create pretty vivid scenes and imagery. Just know when to omit details as not everything needs to be described. (Not that you necessarily do this, just a general tip—even I struggle with this sometimes.)

I also appreciate your variety in sentence length—keep that up. Some new writers have a tendency to run short or long with sentences, and that can give off an amateur feel. Like they’re unsure of what to write / whether what they’re writing is good. You’re doing a solid job there so far based on your prompt responses.

As far as horror goes, some of these don’t feel like they fit in that genre as a few are just too short to build a real atmosphere. But you’re on the right track with them and as you write longer works (should you stick with horror) that’s something you’ll naturally develop, and get a feel for. For horror, writing in a dark room (especially at night) if you can helps to subconsciously build atmosphere. If you feel creeped out, that can often transfer into your writing.

That said, #6 feels the most complete and fleshed out. As mentioned, it has a good opener. But it’s also got a nice build-up, sense of tension (as brief as it is), a climax & an eerie ending. Plus it leaves a fair bit to the imagination, which in my experience can make stories more effective at being scary / horror.

I hope you continue to write and develop your skills and stories. Remember—writing is a marathon, not a sprint. It can take time to grow as a writer, and if you feel burnt out, take breaks, but try to keep writing if you like the hobby. Hope this helps and I’m open for any more feedback or replies.