Some items won't be delivered until the game releases. For example, the soundtrack will be written one song at a time as each planet is created, so in that case, the end of the campaign. Others potentially during development (the backer preview build and the beta version are examples), however, I'll be trying to group up deliverables as much as possible so as not to cut into development time. I'll keep you informed via Campaign Updates.
It's only open-ended in that you can go in any direction, but the narrative and game itself point you towards a singular objective (the distant structures/light beam), which you need to visit in order to advance the narrative.
Eventually, you'll reach an end point where the game and story wrap up, and the game completes. I do hope, however, that players enjoy the experience so much they might wish to replay one or more times.
I definitely want this! I hoped to use NVidia's Ansel for some new screenshots prior to the Kickstarter launch, but ran into an issue at the last moment. I won't make any promises, but it's very likely.
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