You surely have impressive sprite arts on characters. Background and objects are simple but they're coherent and they sort of build a unique mood around it.
Control feels... quite weird and unintuitive for the floating part. I get the sense that you're operating a suit with boosters but steering can be done in different ways (like one key for forward translation, two keys for clockwise rotations). And for an escape mission she's walking way too slow. I guess it's supposed to be slow as they're technically in a low-gravity space station...? I wonder if that's the reason her friend didn't have enough time to get out...
For the theme and story, it's a touchy little story about Reisen's background.