Slightly unsure... I think it was good
It seems very much like a MGS tribute rather than a parody. It was meant to be humourous, right?
The music and sound was very good, but some of those deaths were appalling, especially the first one. The blood was also quite badly done.
Also, the backgrounds are very bland. If you improve the animation and background detail, it will be a much better movie. A good start, though. Keep it up.