I really liked it.
It just felt realistic. I don't know.
I'm glad it was this short because with that countdown there was a real sense of urgency. The diary entries made it feel realistic and I really tried my hardest to escape.
I luckily did it first time which I suppose is the reason why I felt that this just worked, because I was right down to the last second and everything came together uniquely. The only thing I disliked was the Fire Extinguisher was wrongly described I think, you should have said tied or something. When you said fastened, I thought metal and didn't think of burning it.