There are tons of great things about this episode. The plot keeps moving, never dull. Despite the idea of a game where the real world affects people inside the game – here it works both ways – and the people inside the game effect the outside.
Another thing I really like is that no one ever directly SAYS what’s going on. The writers trust the audience to piece it together. Similarly, Quark pieces it together quickly, which allows the stakes to be raised quickly. The episode also does an honest job of balancing Quark’s interest in winning with how much he wants the crew to make it out safe.
One other thing, the game seems partially inspired by the movie Cube. I’m not saying this is a rip-off but it actually provides an interesting take on what was actually happening in Cube.