Looks good Gill.
Your two guys came out good. And nice work on the glider wings - that are very fine and the kind of think that can catch the eye if the straight lines have some wiggle (which yours do not).
One suggestion - You might think about adding some green or blue/green watercolor wash to the top edges of the mountains to help define them a bit. Test first with a scrap piece and cut something like the mountain background, then wet-on-wet (wet just the mountains with water, let it sit a minute, then dab watercolor paint into their upper edges) - the color will bleed down from the top and should give the impression of depth and distance.
