The colors in this one are somewhat inspired by Calvin and Hobbes. I really like how Bill Patterson would use sort of unconventional colors to fill in objects, and I tried to emulate that idea here. For example, in panel 2 on the left I colored the leaves blue instead of a typical green. I'm not sure how well it worked out in this strip (the middle panel looks really awkward to me) but it was a good experiment.
I think this is an okay "goodbye-summer" strip.