Somehow, my sprites broke?

So, everything was looking good... then I built for android... and now my graphics are *hideous*, even when I turn off the Mobile Input mode, or when I just look at my sprite file. I don't know what could've caused that. If I open the sprite file in aseprite (graphics editor), it looks fine.

I don't know what happened that caused the breakage. I did see an error about ETC compression, but I've seen that before and it never caused a problem, so I ignored it, and didn't read it carefully, but that's the only thing I can think of that could've caused the issue.

I guess my questions are:
1) what did I do wrong?
2) how can I fix it?

Image attached...

 

Forgot to mention: rebuilding doesn't give the ETC error anymore, but rebuilding also didn't fix anything

 

and of course, once I posted, I found that somehow my sprite got changed from 16-bit to compressed. I'm guessing maybe the attempt to build did that?

If it is preferred, I can remove this thread, or I can leave it here in case anyone else has the same problem...

 

now this is odd... if it builds with the good graphics, my mobile input buttons don't show up. but when it builds with hideous graphics, the mobile input buttons do show up????