@oadt Thanks for playing! Glad that you enjoyed the game!
Yeah the aliens/viruses don't really fit the other styles, even the other sprites (blocks, player) were not meant to be like that, that whole (defense scene) was a bit rushed. I was planning on making everything a bit noisy and affected by the lighting. I only managed to do that for the background and didn't have time for the others.
Regarding the greyed renters, those are meant to be like dead sectors on a real hard drive. So when they get destroyed, that part of the storage will be corrupted and you can't do anything about it, it just limits the limited space you have even more. Originally I was planning to have it so that you can see the health of each block and decide if you want to heal/eject it and stuff like that. But yeah I had to cut lots of features near the end of the submission.
Thanks again for playing and for the feedback!