Great colors... (it seems a little dark on my screen for a sunny shot) ... maybe a little more contrast or is it that I've been outside in the bright sun all day?
The horizon doesn't bother me so much, but you might want to consider taking a look at this one with a crop that enlarges the bottom right quadrant and shift the parachute left and out of center frame. I know I'd like to see more of the boat and chute.