Blue Heaven is a solid action pseudo psychological thriller. It's not long enough to be able to establish solid or well developed psychological themes but what it did a serviceable job. Focusing on the themes of what it means to live, and why one would continue to seek life despite struggle; aspects of classism, and what terror and violence mean to humanity. However, like I mentioned earlier this manga is incredibly short and doesn't have the ability to really let those themes set in.

In all the characters are mildly interesting too, but the antagonists are cartoonishly evil to the point that it can really take you out of the story. The crew members are solid though, and the main character Seiryuu was mildly interesting and definitely helped with carrying this story.

The art in this manga was honesty phenomenal. There are plenty of stand out, absolutely impressive scenes that are more than worth reading the manga just to check out. The way that the Blue Heaven was framed in each of the scenes where it's the main focus are utterly stunning and display the internal/external tension with it's physical destruction incredibly; and was very obviously a constant visual metaphor for the state of the world.

All in all, good manga but it doesn't try to be anything terribly special; and considering the length and the general quality of the writing I do think that is for its favor. If it was a longer story that had more time to breath it really would've been to it's benefit. I still do thoroughly recommend this read.