When I read the first chapters I had the following thoughts: "This is a unique and interesting story, however can this be 100+ chapters long? Or at least 50?" And as you see, with a total number of 14 chapters, it couldn't. But why was it determined to be short, and still be felt complete? To answer this question let's start with this review.

Story 6/10
As I mentioned, the story starts very interesting and unique. It is a kinda sci-fi Bakuman, and I like bakuman a lot. But right at the start you also get the feeling of emptiness or not well thought out story. Maybe It was never mean to be a long manga, but that would be strange if you want to serialized your work. But what was the problem? The main plot was interesting, of course, but when I read a chapter at the end I had this feeling of "was that all?", and not in a good way. While Bakuman was relatively fast paced, it still felt full of comedy, drama, romance and what else, and kept the readers hooked. In this work, you had this "timetravel manga writing" plot, but mostly the story was just filled with amazing art, and not a deep story. The timetravel was just for shine, all the manga work process was mostly just skipped, and character developments wasn't even there. So for example, you got maybe 2-4 (cheap) lines of plot, but the rest was just art. And yes, you can tell a good story with just art... for a battle/action manga, but not for a complex sci-fi drama, what it has supposed to be.
So at the end, I gave the most points for the exciting idea. In addition, it rushed it's own main story. So yeah, the story writer completed his story (in 14 chapters), but he sacrificed a lot of potential and side stories.

Art 8/10
The only outstanding thing in this manga was probably the art. It was really detailrich and the character designed envolved paralel to the story. However, there was just 2 real characters and was just running for 3 month, so he didn't have to come up with new designs, attacks or places. For example (again) in Bakuman, the artist had to draw a pair of manga styles within his own art style. So sometimes it was a clash of styles which was really exciting. While here you get this one style, for this manga, and the 2-3 mangas within the story. So even it was amazing and detailrich, and maybe it was due to its shortness, it had just this one style for all.

Character 4/10
The biggest problem for a short manga is everytime the character development and/or the variaty of characters. In this work, you get 2 and a half character (the half was the "timetravel"... which you will understand if you read it). Their development was also so damn fast, one of the two just got its full story in just one chapter... While the main character was a kinda a workaholic masochist with almost no reason. We got a bit of explanation, but like the whole story, it felt empty and not well thought out...

Enjoyment 5/10
I really enjoyed the art and the base plot. But as I told you before, at the same time it was too fast paced, it lacked of character and it really felt empty. If the mangaka did not start with this speed story telling, he may could put more story and character development in it. Than it may catched or hooked more readers and would be more enjoyable.

Overall 6/10
Overall you get a fast paced, but complete story. However, it was supposed to be a complex sci-fi drama about manga creating, but failed completely. The art is definitely the strongest point in this work and I hope for more artwork from the drawer. The storywriter had a excellent idea, but he maybe need more experiance for a story like that.
I would recommend this manga, if you want a short unique timetravel manga story with nice art. However, if you really want a story about the manga working process Bakuman is a way better option. Also you will find a way better timetravel sci-fi stories than this. (I never read one... I just heard a lot about Steins:Gate, so I can't recommend any like that. For Anime, I just know a few like 'Island' or 'Punch Line' where the main plot is time travel, but none of them are truly sci-fi)