Mice prefer to live in enclosed spaces and favor vertical cover to avoid being seen, as protection from predation. They are less active in areas with little cover.

Art and fact by Kristina Leslie, Instagram @tinaleslie_ & fact by Nicole Rodrigues, Twitter @n3rodrigues
[Edited by Nicole Rodrigues]
Reference:
Jensen, S. P., Gray, S. J.,& Hurst, J. L. (2003).How does habitat structure affect activity and use of space among house mice?. Animal Behaviour, 66(2), 239-250. https://doi.org/10.1006/anbe.2003.2184