So awesome to hear all of this! Event Horizon + Sunshine is a fantastic mashup. Love both of those movies.
I'm so glad the mechanics made things quick and easy. A major goal of the game is just to make it easy to get to the table from all directions--PCs, GM, etc.
My PCs are digging the sacrifice mechanic too! We've had some great sacrifices--not just the story beat, but a clutch way of overcoming a particularly difficult Danger.
If/when you run again, let me know how it goes!