Survival/battle royale genre have some of the most entertaining concepts. This one also has a good shlock concept. People killing each other on rooftops. But like most of the animes/mangas in this genre, Tenkuu Shinpan fell into same fatal mistakes. First one is, giving unncessary complicated and tragic back stories to pretty much every character in the anime/manga. This is essentially Fortnite anime, people dont care about woman in the nurse outfit was mean to elderly or guy in gimp suit had cancer before they magically transport to rooftop world. They want people kill each other with creative and gorey ways. What you should do is, giving your 2-3 main characters somewhat interesting backstory so your viewer/reader relate/root for them and leave the rest one dimensional so your story would be smooth. In a genre like this, smooth storytelling keeps audience busy and dont spoil the entertainment. Second mistake is, adding an overly complicated philosophical main plot that they reveal slowly as if it was a plot twist. This kind of mistakes just prove that writing is really hard. You can come up with a good concept but if you are a hack and sloopy writer, your story fall apart really easy. This is what happened in here. When you look from above, it looks like a full block of cheese but when it is on your sight, you realise it as a block of swiss cheese, full of holes. I dont like to say `overly ambitious` but it kinda is.
In general, quality of animation is decent, soundtrack is OK, VA is good. There are lots of fan service which is a MUST in this genre. So if you like survival game and gore, you will have a good time. If you are not into it, just pass. You wont miss much.
