For the 2nd point, I solution is easy. You can do either of 3 things:
1. Change your White Balance to a more cooler tone. 2. After shooting, correct WB by applying a cooling filter. 3. Forget everything and shoot in RAW, and correct WB at time of processing.
1. The tilt is not looking pleasant. I know, the relative lines between the water's edge and the platform on which those people are sitting are at an angle, but that is upto you how to compose it to avoid the tilt.
2. There is a definite yellow/orange cast on the picture. Maybe it is not coming up on your monitor, but I can show you the difference if you want.