Great first half, but disappointing second one. Started off amazing, but once the main characters discover what it is all about (at around ep 15 almost everything is revealed and the rest you can easily guess) it becomes a bit of a drag.
Would have preferred if the story would have focused on them actually playing the game to the end (instead once they discovered the truth behind the game it became a whole different thing) - I would have actually liked if how the game existed was left a mystery and they never interacted with the tech company.

Props to the main FL, which was amazing during the games in the first half and was actually smart (not like a lot of FLs I see in Asian dramas).
Romance was there, but did not feel much chemistry in the lead couple, while the second leads were very cute.

If I need to compare it to another series, I would compare it to Reset. I felt the same when watching both series: Great first half with a mystery that has you on the edge of the seat and cheering for the leads to figure out what is going on, but once the truth it's revealed the drama starts to lose its appeal.