Kyoukugen Dasshutsu ADV: Zennin Shiboudesu

The gamer can configure the difficulty levels, so after escaping from the Easy Mode, come back for the Hard Mode.

Sigma wakes up in the middle of an elevator with a mysterious girl. He has no idea how he ended up there, he only knew that if he doesn't escape before the time's up, he'd become a puddle of blood and bones. And this is only the first test. Feel the suspense, the danger and the urgency in Kyoukugen Dasshutsu. 

Do some detective work, find clues about your surroundings and talk to the people you meet on the way. There are 9 characters in total. Each of them has their own agenda, some will offer assistance only to betray you in your hour of need. Find out about them during the adventure part, and fiddle with the locks and solve other puzzles during the mini-game part.