I enjoyed just driving around for a while before I figured out how to actually collect the flowers. Then I drove into the ocean and lost all my flowers, which was sad. It took a while to figure out that you're supposed to return to the spawn point with loads of flowers. I didn't have any sense of why I was supposed to be murdering and collecting every flower in the area, either story or gameplay-wise, so collecting flowers felt less rewarding to me than just bouncing and rolling around on the grass like a happy dog. The truck physics was fun!