OK, it's time for a complete review!
Here is it:
The story seems to be interesting and exciting. The back-shift is a good idea.
The terrain design is nice, but some more details would advance it very much. The skinning is not bad, too, but the color of the little boys' faces needs habituation.
The effects are well positioned, not too many or too big and what they should be: effectful.
The camera motion and usage is OK, a bit more motion won't be bad.
The sound effects are used in a sufficient quantity, some would perhaps better underline the effects.
The music is good, nothing to critisize here.
There aren't many bugs in it, but one looks very stupid: The mother says "come in my boys" and all of them go THROUGH THE WALL into the house. Show at least a door in it, if it isn't avoidable to let them run through the wall. The best would be to cut this "wallbreaking" scenes completely out, I think. They aren't important for the story and just look as if they were ghosts, very strange!
All in all:
story: 5/5 (if continued)
design: 4/5
effects: 5/5
cameras: 4/5
sound+music: 4/5
bugs: 4/5
__________

4.4
This a nice start and the cinematic series should be continued in that way, just cut out scenes that don't look good!

Waiting for the next part...
Yours truly
Waldbaer
PS: The size... could be optimized very much. The most important would be to set the encoding rate of your MP3s to at last half of what it is now. 128 KB/sec are really enough for cinematic music. The earth ball at the beginning is also very nice, but it makes the file about one and a half MB bigger, what is too much for a 3-second-effect, I think. Change the quality of the BLPs, especially the CloudMaps don't have to be that sharpened.
Following these tips, the map size could set to about the half. Optimization of this kind is strongly recommended for all your future maps!
If you don't have the tools, ask me. Otherways change it!