You've just described basically every idea that I had and couldn't pull off, other than the larger hole/see inside bit. I wanted like a thin stream of glowing blue fluid coming out but I couldn't work it, the areas just too bright, I may try again now that I've got some more colours though. The space is too small and bright to put the little flappy material bits (or I'm just not skilled enough). The little beams of light was actually in my head from conception but I kinda threw it out at some point, they're back now cause lithander and pistachios method of making them look like holes really detracts from it looking like a light source. I can't really move the other hole because it would mess with the lighting.
Big thanks to pistachio for the blood idea, for whatever reason it hadn't occurred to me. I can't really crop it because that's the games resolution. I might move it to the side some, though.
I will try the fluid droplets but after that I think I have to start working on some more functional graphics. I might come back later and try my hand at a background, I was thinking maybe a solar eclipse of the earth or something. I'll still take any crits into account though of course.