The work on the bunker is excellent - the camo net adds a certain something.
On the negative:
The sandbags. Dump them and replace them with scratchbuit ones - the Tamiya ones are too uniform.
The barbed wire is well out of scale. You simply wouldn't see a single strand of wire either - replace all of it and add more..
The groundwork needs to be much more convincing. To my mind at least, it looks like plaster, try using some actual (very fine) sand and break it up with some vegetation.
I would't be standing about if some one was firing a FT near me - nor would anyone be firing it a few feet away from a door. When a FT is fired, its is effectively liquid flame - it would spray all over the place so your positioning is unrealistic...
The figures - not a bad job with grossly inferior figures. Personally I would transfer them to the large spares box which is outside your house (and emptied every week) and start again. Look at the DML recent U.S. infantry sets and you'll see what I mean....Jim