Create a 1:1 in-game screenshot from a fictional block-building sandbox adventure game, showing the player exploring a suspicious prewar Japanese research laboratory. Use a blocky voxel world with cube-based architecture, tiled floors, wooden beams, old laboratory benches, glass bottles, strange machinery, paper records, dim lantern light, shadowy corridors, and subtle mystery atmosphere. The setting should suggest early twentieth-century Japan through period architecture and props, without using real game titles, real logos, copied HUDs, trademarked block-game UI, or existing franchise characters. Make it feel like a playable exploration screenshot: first-person or over-the-shoulder viewpoint, atmospheric lighting, readable spatial depth, and polished square composition.