Most of the information you need can be found on the Kickstarter page. From that page, you can see the following information:
It's far too early to say what the minimum specs this game will be. Even Novaquarq don't know at this stage. Remember, that there is no game as of yet, only the basis for one. (That goes for any pre-Alpha or Alpha build.)
Whenever considering the minimum requirements you will want to take note not only the supported OS but also the minimum requirements for GPU, CPU, and RAM. I suspect that if you are running Windows 7 (the time for free upgrades to Win 10 has sadly passed) your system is already fairly old and I would not count on it being able to run this game. But I would caution that this is speculation on my part.
