Oh my goodness! I mean what is there to say that others haven't? Its so simple and absolutely amazing! I think you really have something amazing here and you should experiment with this idea more 100%. I think even the graphics are basically perfect really. haha. Maybe you could make it look more like a 'terminal' but really I don't have much to offer in terms of what could really be done better, its really perfect as is! haha.
The only downside I noticed was lots of clipping in the audio, but thats just a minor thing, and honestly it actually fits the vibe of the game quite well (like radiation clicks), so even that just fits. lol. Simply incredible! Bravo!!
Make this a mobile app game ASAP and watch the ad revenue pour in! haha. I would play this so much between doing my daily activities. haha. Great work!