Really nice to have some non-standard movement mechanics in there, fits the 'weird space location of the future' vibe. The 3d bg visuals are cool, but... I would rather have a better view of the action / text. Even a simple camera jump in tight and out when you click on a level / email would have been really nice.
The ending stuff is fun, if super sketch XD. As someone who usually does all my own everything, I feel you on the creative side. Sure there's a lot of free assets you can grab, and they will probably be better than whatever you can make in the time left over after coding a game and designing levels - especially if you end up giving yourself a four hour clock.
If you've worked with them before, you can put together a nice static star field pretty quickly in godot using a texture rect you assign high frequency noise to (by selecting a noise texture (fastnoise), and a cut off shader that turns anything below a certain threshold to black.
