I like the Space Hulk style derelict ship exploring theme. I like our mother ship too. There's teleporter and stuff and you can jump between systems(that star chart looks like the one from FTL btw) cool Star Trek vibes, like the atmosphere and the worldbuilding. The retro style graphics look nice. I espcially like the dithering effect.
The deckbuilder combat is straight from StS, which i have beaten recently, so it was kinda strange for me to see that here :) But i like the implementation of it. New cards in the ship cost too much. I could buy only one in every 2 runs. Trashing cards are expensive too. You don't get too much scrap from runs. I don't get what biomass is for. You don't buy anything with it, i didn't see anything in the game that it is used.
The emphasis on combat in the game is too much for me. If someone made a pie chart of things you do in the game, probably %80-%90 of that chart would be combat. There's almost no exploration and maps are very straightforward. Maps only serve as arenas to kill the monsters. The layout of each ship is different but they look identical otherwise. I wanted to beat the game but the frequency and number of combat burned me out at some point. I had to drop on the level before the last one. Game is pretty long too. I played it at least for an hour maybe more. Not only there is too many combat encounters, the time combat resolves is not very short either. It felt really repetitive to me at some point.
I really admire you for making this game with an engine you built from scratch. That's an achievement in itself. Some of the things in the game can be improved maybe but i enjoyed it overall. I'm always down for a Space Hulk/Star Trek kind of Sci-Fi crawler anyway :)