The project started with a group of strangers meeting at a global gamejam event in 2012. The first prototype was super buggy, but our idea about sacrificing your character to solve puzzles and make progress was well received, so the four of us decided to keep working on the project as an evenings and weekends thing.
Sharing early prototypes with online communities provided a lot of feedback and encouragement. As the project progressed, more of the group started to focus on the game full time, working up to the release this month. The Steam page for the game is here: http://store.steampowered.com/app/250050/
If anyone has any questions about the process, or the game, I'd be happy to answer them.