Sound felt weird at first, but then it developped with the sneezing sound and then it became awesome xD
It's a really great idea you have put together, and a very interesting take on the theme, but unfortunately, gameplay-wise it isn't as cool as I hoped.
The weapon feels kind of weird, it's confusing and without the first level I think I would have had even more trouble finding out.
The timer is also often out of the field of view, which is not really helpful. I'd suggest just putting it in the UI.
And finally aside from the limited time, I think it lacks a lot of challenge and it gets a bit boring at the end. Especially when you discover you can clip through walls.
Aside from all that it is a nice little game and I have laughed a bit and I had a good time, so congrats !