I never played SPAZ, but it looks fun Will check it out!
We plan to do a kickstarter campaign this november and release the game as an alpha for our backers on steam directly afterwards.
The steam early access release will follow 1-2 months later.
We haven't decided yet on a price for Nimbatus, but it will be in the range of 14-20$
We'll make a more detailed post on the roadmap and where we wan't to go with the game soon