I´ve skimmed the Steam forums and I think the devs aren´t very active there either. These days, many developers focus entirely on their own Discord channels for communicating with their fans - I´m assuming this might be the case here as well.
Regarding the crash on startup, it seems a lot of people are experiencing the same issue. The bug is mentioned in the pinned Thread on the Steam forums (
https://steamcommunity.com/app/894020/discussions/0/3062995372956204964/ ), alongside some basic suggestions as to how to fix it.
1. Make sure your graphics drivers are up to date, some crashes can be a result of D3D initialisation not working correctly.
2. If you had played the game fine and then come back to find it crashing it seems it might be something to do with a resolution setting or using multiple monitors, Unity (the engine this game is made in) stores some of these variables in the registry, then on startup if one of those entries has some issue it can cause a crash. We are looking into why this happens but for now you can try the following to get the game running again:
Open registry editor (start > type regedit > enter) and find the deaths door entry under SOFTWARE/Acid Nerve/DeathsDoor and delete all the entries in that DeathsDoor folder
This will reset any of these stored variables and you can try running the game again.
3. If the above didn't help please post below.