Well
The graphics, story line, and picture motion for this game was top-notch quality. The story line was also very creative (honestly, who would've thought of making a game out of some cave tour exploration?). I like how the game is pushed along smoothly with fresh twists and scenes like the lights going out and everybody gets eaten. By the ending, I was really hoping that there was already some sequel out that I could continue at, because you've really got my interest. Evil underground taking over earth - what's there not to like?
The main downside that stops this from getting a 10/10 from me, is that I feel the interactivity and action isn't exciting. Basically, the good graphics and film-like qualities are the only two things pushing this to the viewer, and I think it could accomplish more than just that. If you made this thingy to be a flash game, and not a flash movie, there has to be more action and options for the player. But since this is what I'm assuming to be the first of a series, you're still doing great.