Nice kit snake doctor, esp for putting it together with just what you had lying around. And + 1 on the packing job.

Any time I evaluate a kit (even my own) I compare it to the 5 immediate priorities: Medical, Shelter, Warmth, Water, and Signalling (I remember this with the saying Many Silly Water Willies Swim - silly I know but it works for my son and I). Looking at the list, you've got some basic Medical supplies (about as much as possible in a kit this size); Shelter is an obvious omission that jumped right out at me, but in all fairness it is often left out in a kit this size and can be easily added by folding a bandanna around a large garbage bag or two and putting that in another pocket or securing it to the outside of your tin; Warmth seems to be adequately covered, and though you do have some waterproofed paper matches, be sure the striker strips have a way to stay dry (they have a bad habit of disintegrating when they get wet); water looks to be covered as you have a way to store it with the water bag and a means to purify it with the aqua tabs and chlor floc (though I am wondering why you carry both of those); Signalling is another weak spot, esp with no whistle or signal mirror (you do have fire making capabilities which can be an effective signal, but as stated above be sure that ability will not be compromised).

The rest is gravy. You included some tools (assorted sharps), multipurpose and repair items (esp the sewing items and tape), and some items for food procurement (snare wire and fishing kit). One tool I would suggest adding is a small led light, and adding some aluminum foil wouldn't hurt either and would take up very little extra space (and space looks to be at a premium in your kit at the moment).