The mod was received well and we, the development team, have since then moved on to other projects. You are able to download Decadence, as well as the Decadence Development Kit (for creating levels to Decadence). Although they are no longer supported, and perhaps even broken, they can be fun to play together with three close friends.
We put together an ambitious post mortem to sign off with. You should check it out, it has received good critique.