It's called Agony not Happiness. A descent into hell with its own charming art style. Strangely enough, it's been helping me wih my depression BUT anyway, on the other hand it's been a one-of-a-kind experience that's certainly different from other games. It's like trying to complete a never ending task for the devil, yet you're still getting to enjoy the little rewards along the way. I'm currently playing Agony then will play Unrated as a second playthrough. Kind of will be like a reward in itself.
No joke unless you knew this game came out in 2023, you would have thought it came out back in the 90s for the N64. Playing it is a lot of fun; figuring out puzzles, gaining new abilities and traveling back to find new openings can make it feel very nostalgic to those who had a console with polygon characters. Although my only gripe is the music, it's kinda quiet. Other than that I love it and find it to be the perfect break from all the mature games in my collection.
