Not bad! Still incomplete but certainly not a bad start.
But you really made it hard for me to get used to it.
First of all you should make a web build after the rating period, Windows builds are always risiky and you should not be surprised that a lot of people do not download windows only builds at all.
VirusTotal said your download checks out okay and I am using a throw-away installation of Windows any way, so I gave it a try.
And I am glad I did!
But I'll break down my experience so others know what to expect and where you can improve.
Game launched in windowed mode but captured and disabled the mouse cursor. Thats odd. Okay 'alt-enter' would bring me into fullscreen mode but not everybody knows this.
Selection without mouse is not really intuitiv but I could use the cursor keys and space to select the options. However I was not sure what I could do with the crew option or upgrade section (I learned that later).
Start Mission worked fine and the cut scene was great.
The perspective kind of reminds me of an 3d plattformer just inside the Synty Space Station Pack. Which is okay.
It is however important to know that the 'M' key would bring up a map because at first I was just jumping around without a clue what to do and almost thought that this was all there is. So a little tutorial or least some text to explain things a bit would be very beneficial. Found an enemy by accident and figured out the turn based combat. But it looks like that nothing except "Attack" works. The attack actually implements the theme spin based on our reaction time using a attack/critical section which is fine. Because I had no equipment I did not stand a chance against the Protofactor alien eventhough I got a good bunch of "perfect" attacks. Also found some crystals and then use them to unlock a 2nd party member in the previous "upgrade" section.
Did not find any bosses tho and mostlikly would not stand a chance against them without gearing up first (which is not what a boss rush is about).
There is already a lot of systems implemented so I can tell that a whole bunch of work went into it, it is just that all the individual parts feel rather incomplete which reflects badly on the entire game. Which is a shame but I think for a one month game jam you overscope quiet a lot but you can expand on this after the jam, it is still a lot of work required to make this a complete game but it can be a good one!
There is no sound at all, adding some background sound and effects would make your game much more enjoyable.
I like the idea of unlocking party members but this begs the question why I can see only one when I am in the 3d plattform mode? Mixing an interactive 3d single player view with an party based turn based combat this way seems like an odd choice.
Last but not least: I see that you use the Synty Space Station pack along with the Protofactor Alien Pack and that generates a very incoherent visual. While the Synty packs have they own low poly palletized look, protofactor uses highpoly models with PBR textures and that is not a got fit. I suggest that you replace the Protofactor models with other Synty modells to keep an coherent style.
The only way to exit the game seems to be to ALT-F4 out of it, which propably only takes one Apllication.Quit() call to fix!
It is certainly a big project you have going there and I would not mind to see more of it.