The game has a rich atmosphere and pleasant aesthetic, but it carries all the frustration of early Metroidvania level design with few of the positives. Levels are arcane, rarely fun, and made stressful to explore by the need to constantly refill oxygen (until you get the right upgrade, anyway). The final level and boss encounter is a terrifying and awesome sight for the Genesis, but a great example of how this game is more fun to look at than actually play.