Review Detail of Nimblegalaxy in I Can Make Everything Level UP

this is one of the best reincarnation novels I have read on webnovel. story development is good, characters design is also good, harem doesn't appear to be forced, MC is also not thinking with his lower body, MC is not a slave of the system, etc. while the story is good there are a few points desired in the story according to me 1. first is there are too many grammatical errors, sometimes spelling mistakes, sometimes name changes. So I think the author should take a few days' break and correct those mistakes as it will hurt him in the long run 2. MC is severely underusing his system. while the title of the novel is "I Can Make Everything Level UP" MC is not using his system to level things up ( or at least it appears to like that in the novel). 3. MC is not using his modern knowledge enough, I can understand MC was some king of genius on earth but he should be able to copy some simple things from earth. (the only thing I have seen him make is a crossbow but even that is after he saw someone else using it)( till chap 230 at the very least)