This is a REALLY good game.
The weapons feel satisfying to use. I like that you can have multiple characters, especially as there are multiple classes. Speaking of the classes, I think the skills are all pretty useful and thought out.
Map design is also REALLY good. The two maps on the secondary campaign are even better. It felt new and different from "hold them off until the boss comes, get this, go there, defend this" kind of gameplay.
I can't wait to see what you do with those two blank planets in the background. I noticed that there are only 19 skill slots. Assuming that the 19th skill was added alongside the two additional maps, could we be expecting a couple new maps as well as a new skill in the future?