Throughout the four locations, the position of Ron's glass may be toward one side or the other. Account for the wind and throw the ice cube into it to have it curve into the glass. Do not to toss the ice too hard.
Bonus points
Each of the four locations have interactive environments. Besides objects that simply are used to bounce the ice off of, others will result in bonus points. For example, Baxter, the fake shark in Ron's apartment, and the tank of scorpions in the RV will catch ice in their mouths. You can also get a combo to get more points. Bounce the ice of off Ron's face to earn additional points. Baxter will sometimes howl to blow the ice forward.