People suffering from the startup bug: I'm terribly sorry for this inconvenient hyperspace malfunction!
*TEMPORARY small workaround* --> rename the "steam_api.dll" file in your HIIIPE folder to something like "_steam_api.dll".
WARNING: This will disable achievements & leaderboards but at least you can play it locally until it's fixed.
* Debug data *
- Latest Steam SDK version: check
- Latest GMS version: check
- Latest steam_api.dll version: check but not working to desired effect... proceeding to further investigation. Message to Steam staff sent. Off to bug GMS devs. Suggestions welcome.