Chain looks ok to me. From what I've read, and been told, and what I usually do is check the chain after tightening it. There should be about a 5 - 10mm of flex when pushing down on the chain, midway between the cog and chainring, at the tightest place. Or tight enough but not so tight as to bind the chain. You can test by rotating the crank and trying to "throw" the chain with a wrench.

You'll find that, with most chainrings & cogs, your chain will be tighter in some places, and looser in others. I try to strike a balance between these two extremes, while erring on the tighter rather than the looser.

Besides, sometimes a little looser is better. It makes track standing easier