this fix that someone posted below seems to work for some distros:
"
nevermind I fixed it, so in linux:
chmod +x SpookyGhostsDotCom
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(pwd)
export LD_LIBRARY_PATH
./SpookyGhostsDotCom
"
same on Debian. game uses steam protection to run. instead of looking for a solution to link that steamAPI file you'd better ask why it happened on DRM free storefront. I just sent error report, hopefully itch support can review this game and will ensure we don't need to dance around steam DRM to run this game.