My rating so far...

[Silent Shadow]

From my experience with this game so far, I give it 5/10. This would've been the greatest menwa adopted game if it wasn't for the time limit feature. Don't know why it has to be 2 short minutes for every single mission. Because of this, I'm not given time to explore and admire the environment, and properly strategize my fights with boss enemies: I am forced to willingly take damage from enemies because of the rush to finish each stage within 2 short minutes. I was eventually getting to tougher stages that're next to very tough to win because I'm not strong enough to finish in 2 minutes. And it would take me literal days to grind enough for those tough levels.

It would've been best if they made this regular paid open world single player game than this money walled MMO.

[Go2Sleep]

I think the time limit was based on the manwha, when they enter the dungeon it also has a time limit before it closes "A dungeon must be cleared within seven days. If it is not, then it will undergo what's called a "dungeon break", meaning that the monsters inside the dungeon will be able to cross over to the human world and attack the civilian population."

[Silent Shadow]

Well they could've at least have different time limits for different missions instead of just 2 min for everything, or the ability to gain exp on missions you already did. When I played, I had eventually reached the point where it's kinda impossible move on because I'm not strong enough to beat the stage in time. It's like that for optional stages as well. And the grinding process is very slow. You have to wait to receive exp automatically or buy stuff to level up faster. I quit playing at that point because of that "money wall".