Ooh this is an interesting looking comic.
Overall, it's pretty polished in terms of the quality of the art and how it's put together, with a consistent art style, good inking and colours, but there are some things that jumped out at me:
The speech bubbles at times don't quite leave enough breathing room for the text inside them, and the thick white stroke on them set to outside positioning gives the tails this rounded, snubbed kind of look. They'd look a little more polished and finished if you made them a little larger to give the text breathing room, avoided tangents caused by the square bubbles sitting on panel borders and set the stroke's position to centre or inside.
Lack of a proper establishing shot makes it really hard to drink in the atmosphere or the situation the protagonist is in. The camera is always pulled right in on him, not really showing much of his situation, and because the shots are always pulled in so tight, when there are close-ups, they're robbed of impact, because they're barely any closer than the majority of the shots. I can't really get invested in the mystery of what's going on because I don't feel like I'm getting a really strong impression of where the protagonist is (it looks like a school, but it's full of dead adults and the main character also looks like an adult, but he doesn't seem confused by this?).
Sometimes the expressions of the main character don't really seem extreme enough for the awful situation he's in. He looks mostly a bit bewildered and surprised while waking up under a pile of corpses, getting told he's to blame by a dude in an extremely gory state, then seeing him die, and then witnessing somebody getting eaten by a dog. I don't feel as horrified as I probably should because the protagonist's expression and bodylanguage are more like he's in a weird scenario rather than an utterly horrifying one that'd probably cause most people to throw up or have a panic attack.
I felt like the colours were very bright and warm and generally sunny feeling for the tone of the bloody scene that was going down, and it robbed the scene of some impact. I understand that the scene is happening during the day, but some harsh contrast in the light and shadows, and less warm, soft colours would add a bit of weight and power to the story.
The blood feels very watery and thin because it's so pale and transparent, so it doesn't really evoke the horror of being covered in human blood because it looks fake, like watery red paint. The overuse of premade splatter brushes makes it hard to miss that they've been used. Maybe use them more in conjunction with other techniques, and try to get a bit more richness and depth to the blood.
Overall, it definitely has potential, it just feels a bit like it's trying to do horror while pulling punches on being horrifying. A little more atmosphere and intensity would really help sell the scenario and tone.