I remember reading this manhwa long ago but I'm not sure if it is the one you're looking for:
https://www.mangago.zone/read-manga/the_player_that_can_t_level_up/
It's not that one, the one that I remember started with the game and then the world changed and the thing from the game showed up in the real world
https://www.mangago.zone/read-manga/ranker_who_lives_a_second_time/ I remember in this one he stays in the training level to hoard different stuff and then he goes to the a tower , and there's a story with his brother who he wants to avenge? Hope it helps you !
I found it, it was Solo Max-Level Newbie but I will see the one you postes later, thank you
I remember reading a manhwa where the MC played a game and discovered that in order to win the game you have to not level up (or somethin like that) and stay level 1. Then the game becomes reality and he starts to use the information of the game and I think in some point he enter a tower... that is all I remember.
I tried to google it but didn't find it. I just wannted to re-read it, because I can't find anything to read (and already re-read alot of manhwas like that)
Anyone knows the name?