Glad you enjoyed it! And yeahhh the lack of aiming was mostly out of laziness from me, I didn't want to draw the player sprite aiming at different degrees lol.
And yeah I wish I had put more story content in. There's a bit if you click the hard drive icon under the hearts, it brings up a little wiki page that describes some of the game objects and characters. I figured that Eris' drive was probably failing just out of age, but I didn't really think that part through all that much, if I'm being honest. In the wiki thing, it implies that Eris is an Esiine Robotics Polydroid 4 Elite, which suggests that there's more of them out there. The basic enemies have a similar sprite and I intended for them to be a different model of polydroid, but I'm not sure if that really worked. There was also a cut boss fight where you fight another robot of the same model but I had trouble balancing it.