All images converted and resized with http://www.aconvert.com/image/

wood_texture.dds cropped (Total Textures - R2 Copyright 3DTotal.com)
wood_texture_specular.dds cropped (Total Textures - R2 Copyright 3DTotal.com)
bricks_diffuse.dds (Total Textures - R2 Copyright 3DTotal.com)
bricks_specular.dds (Total Textures - R2 Copyright 3DTotal.com)
skybox Yokohama converted (http://www.humus.name/index.php?page=Textures&start=0)

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images in 
skybox/game/ 
skybox/lost/
skybox/won/
from PolyHaven (https://polyhaven.com/hdris, [last visited 28.6.2022])