You know I'm just going to write down my honest opinion a:
First of all, it's rushed, like very rushed to the point where on the 2nd chapter the MC has already found the core. Second the art could be given a few more touches as it seems rushed. Third add some more storyline, it feels that this...
This is the ML that every story needs instead of some other ones with an ML that whines a lot or is very dramatic. Though of course there are also good ones, but most have an dramatic ML.