Is this soldering normal?

[fateswarm]

I was disassembling a mechanical keyboard and since I'm not an expert in electronics at all I didn't touch anything. I only cleaned with some alchohol some dirt I found on it from assembly (as it can be seen on this image).

I wanted to ask, is the soldering on the top-left right? I looks like shorting from my view (also something similar may happen in the middle). Or is it normal and I miss something?

PS. By the way, is that dirt on it able to harm it?

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a more specific question: Should those 'light blue' parts be covered by the solder at one joint and not on other joints?

 

[BabaYaga]

Well to me the soldering looks normal, actually the pic looks like it has been clicked with an angle so i can't say anything about that probable short at the top left, one simple way to test the shorts is to take a multimeter and do a continuity test between any 2 probable points, if you post a direct and clean pic then i can say.

what is the "Light blue" part that you are referring to????

 

[chuckey]

The light blue parts are where there is no copper track.
Frank