Merge Prison : hidden puzzle

This is a portrait-oriented merge puzzle game with a light story that can be played in short, interruptible sessions. While generally relaxing, its progression is heavily gated by an energy system and monetization that pushes players towards spending to advance, making it less suitable for those seeking a fair free-to-play experience. It's best for players who enjoy casual puzzle mechanics and don't mind frequent breaks or the potential need to pay to progress.