Feedback on my hard game

Hi developers, I’m trying to make a hard game (also a bit scary), but I don’t know how to make it harder than now, the game is just two small rooms for now, it’s going to be more extensive. But for now it’s only two rooms.
The story a dude that is investigating about what happened in certain places and find who is to blame

Im saying that if you want to suggest what i can add to the story or how i can make the rest of the levels

Game: Douglas Investigation - Roblox
Game modeling is bad, because I’m going to do it at the end, that is, when I finish most of the game. Or what do you suggest?

Why give us guns if the zombies are practically indestructible???

I got in the room and 15 hoards of zombies got out before I can do anything

Solid game though I like the dialogue

Thanks for the feedback. The zombies can die, the arent indestructible, they just have alot of health, also, if you read the dialog, you would notice that it says that you have to destroy the holes where the zombies come from, you can destroy those holes with bomb, that you can find in crates (in the dialog also says that you have to search in crates)
Also, what do you mean with solid game

The start dialog functions like a mini tutorial of how to play the game, you can skip it, but its supposed to be used when you already saw the dialog before

I couldn’t get to the crates because of how many zombies spawned in though

Solid meaning that it’s a very good game

Thanks, I’m going to make the character can now run and the zombies spawn slower, so you can get the crates, im making more levels and more things, you can play the game to check the updates if you want