To be fair, this manga is extremely average. It isn't the best and there are a lot of others mangas with the "you are locked up and playing a game that can kill you" setup.
The story is so so, It's very slow at the start and only deepens when talking about Hiro, the protagonist. In opposition, the last chapter tells almost the whole plot and the ending feels rushed. I felt a bit unconfortable about the author leaving all the explanations for the two ending chapters even though he had 32 issues.
The art is ok. It can be bland sometimes, but it has good panels.
There isn't much character development, one of the reasons that made me a bit disappointed. This is probably because the author didn't wanted to drop hints about the plot ahead of the time, but it ended up making the cast feel tasteless and easily forgettable.
I enjoyed reading it, even though it has a lot of flaws. If you don't have anything to read, give it a shot.

I'm sorry if the review has any flaws, english isn't my first language.
Thanks for reading! I hope it was useful.

"Rabbits get deeply envious, you know."