Players use redstone contraptions (specifically pistons) to interact with "mob girls". Progression: It functions similarly to a clicker or idle game

"Lovely Craft Piston Trap V01" (often abbreviated as ) is an adult-oriented simulation game developed by a creator known as Crime . The game uses a blocky, aesthetic inspired by Minecraft but focuses on adult themes and mechanical interactions between characters and "piston" devices. Game Overview and V0.1 Launch

"Solid" indeed. That’s a classic, catchy bit of Minecraft-style naming. It sounds like the title of a or a showcase video for a player-proof trap designed for a "grief-free" or "crime-free" server [1, 2].