This thing is gold, it has a lot of comedy(good one, not the cringe crap you see out there), mc have some personality and is fun some times.
I know the story isn't original, it mix Solo leveling with interdimensional mercenary, and make it a lot more fun to read.
He didn't turn edge cringe, wich is a good start.
And the system of how goverment use the tower to agriculture(not a spoiler since it doesn't affect the read) and the other features of the guilds make it have some more potential for future reads.
I think it is worth a 8 - 9/10