Haha, love the idea of this! Looks awesome!

There are some issues but we'll get to them later.
First of the design of the car. You havn't done a whole lot to the actual car, but what you have done looks great!

Really works well with the whole offroad feel of the car. The bars on the headlights feel so right, and overall the chop looks cool!
There are some quality issues however, the two primary things have been mentioned above, meainly that the car doesn't quite fit the background and the reflection. First of the reflection looks quite good in the sense that the car is reflected straight down, or almost anways, I can buy that. But! There are waves, even though they are small, on the water, and therefore there should be some on the reflection as well. Using the filter/distort/wave might work. The second issue also mentioned above is that the car doesn't quite fit in the bg. This is trickier, cause it's not an easy scene to work with. My best guess would be to add some more vegetation refelctions on the side, similar to the ones in the window, but they should have a quite low saturation so they become more grey.
Overall I love this chop! Very original, and gave me a laugh. The quality drags it down a little, but overall it's just great!

Keep at it!
Cheers!