This game is as great as it seems, with flaws as evident as it seems.
You'll have a great experience, exploring a world through the eyes of a cockroach. The scenary is detailed and very realistic on the objects and interactions you'll find, even though graphics are clearly limited. It's old technology, but it is so well done it feels right. The history is a good and interesting complement to the theme.
On the negative side, controls and game feedback are bad. Sometimes you know you have to interact with something, but can't seem to get it done, and sometimes you'll find yourself with no clues to resolve a puzzle.
I recommend playing this game with a walkthrough, for times you get stuck. To me, it did not ruin an excelent game experience, and made me focus on the many good points in this game.
It's a short game (I would guess most people would take around 3-5 hours to finish it) and even though is limited on playability, it makes you feel like you're really living a history. In the experience aspect, it is a far better game than many modern ones.