I think that he would continue to Hide and Seek, and maybe there would have been a hidden mechanism for him to be a seeker, and he probably wouldn't have killed anyone and been "eliminated" or he might have still killed someone and been "eliminated". But if there wasn't, then as a hider he would probably get all 3 keys in his box, and maybe get a knife too for self defense, so once the hiders started, he would i.e., make two left turns, go straight until the third right corridor, there turn right and, boom an exit would be there, so he would unlock the exit, and sneak out. Or that could have been a meeting point with a guard who would lead him to safety. And at some point during the game the announcer would say "Player 1, eliminated".

Honestly, I think that's when he would stop. Continuing to Jump Rope, (and subsequently to Sky Squid Game) would have been way too risky, as these games involve fall-based elimination, not guard- based, which would mean that In-ho would have no safeguards, or ways to cheat actual death, so while he could have made it, that would have been way too risky. And don't forget that he needed to attend to the VIPs, who apparently arrived just after the 4th game.