I hated that the show highlighted the sentimental aspect and not the games. Besides the 3rd game, the other games were lame and anti-climatic with so little strategy. If you plan to watch this because of the strategic aspect of the games, lower your expectations.
The only saving grace of the show was Wi Ha Joon's character, but alas look how that turned out... a cliffhanger plothole, literally.

*Spoilers below*
I also hated that MC, I wish Park Hae Soo's character would be the MC instead. The MC is a goody-two shoes but has no sense of reality at all. He returns back into the game knowing that people were gonna die but he is still nice to everyone, even till the end he thinks they can win without people dying. I wished they removed the whole segment where they all left the game because that episode just made the series draggy for me and made me think the MC has no sense of reality. There has to be a second season or that ending would be tragically terrible.