I can confirm the game runs on Linux using Proton Experimental. Just add it to steam, and choose the proton experimental runtime.
SpaceVenture is a sci-fi comedy adventure game that combines interplanetary exploration and puzzle-solving with satire. · By
When I try to run it via Steam with Proton it crashes after the config screen.
Unity Player [version: Unity 4.7.2f1_a7fe7b7f3d1f]
SpaceVenture.exe caused an Access Violation (0xc0000005)
in module SpaceVenture.exe at 0033:404ce693.
Error occurred at 2022-09-17_130420.
Z:\home\...\SpaceVenture\SpaceVenture.exe, run by steamuser.
[...]
Read from location 00000000 caused an access violation.