Bugs, bugs and more bugs. But a good game
When I finally beat the odds and loaded the game without any glitches, I found that the game was fun and had a sort of basic Metal Gear feel to it. That being said, I can't discount the glitches as you suggest, nor can I ignore the lack of ending or the shortness of the game.
For now, it will get a 3 from me, since it seems to be what it deserves. Since it is a work in progress, I look forward to giving a higher score to the next incarnation, when it will certainly deserve better.