Emoji balls: Score 100 points in a single game.
Hard Candy Balls: score 200 points in one single game.
Sports Balls: score 500 points in one single game.
Car Skins: score 1,000 points in one single game.
Star Balls: Play through 20 complete games
Poker Suit Balls: Play through 30 complete games
Music Note Balls: Play through 40 complete games
Golf Balls: Play through 50 complete games total.
Hexagon Balls: Play through 80 complete games.
Cat Skins: Use three revives (ad video offers)
Fruit Balls: Use five revive offers.
Mushroom Balls: Use 10 revive chances.
Pool Balls: Use 15 revive chances.
Pig Balls: pass five of the speed challenges.
Epcot Balls: pass ten of the speed challenges.
Bear Balls: pass fifteen of the speed challenges.
Hatching chicklets: Clear the third race track.
Easter Island Head: Clear the fifth race track.
Birds skins: Clear the tenth race track.
Pixelated Balls: Clear the fifteenth race track.
Red Triangle Road: Complete one classic challenge.
Green Rectangles Road: Complete five classic challenges.
Purple Diamonds Road: Complete eight classic challenges.
Green Hexagon Road: Complete 12 classic challenges.
Blue Chevrons Road: Complete fifteen classic challenges.
Maroon Checkerboard Road: Play one day in a row.
Green Rectangle Row Road: Play three days in a row.
Purple Sidewinder Road: Play five days in a row.
Green/blue road with lanes: Play seven days in a row.
Blue small-chevron road: Play fourteen days in a row.
Red street-like road: Play 21 days in a row.
Green road with arrows: Play in 100 total games.
Purple road with plus signs: Play in 120 total games.
Green road with stars: Play in 150 games total.
Various Gameplay Tips
Tip 1: The first key to getting the highest possible score on Color Road is surviving for the longest possible amount of time. This is easy early on in the game, but as you get farther into the level, you'll start having to deal with awful downhills that block out the row of balls until the last possible second, which will force you to have to look very closely and move very quickly. Best to stick to the middle lane until you know what's coming, so that you can move quickly when needed.
Tip 2: The striped balls are the ones that will give you those sought-after score multipliers. Each one that you collect will increase your multiplier by one, so if you collect 15 striped balls in a row, then every solid ball will be worth 16 points each afterwards. The streak ends when you miss a striped ball, though; then you have to start the streak right over.
Tip 3: Right now, as it is so early in the release of the game, you can't unlock anything new. Fortunately though, Voodoo always comes early and strong with the game updates. When you see the first new update to the game, expect it to have all kinds of ball unlocks packed with it.
Tip 4: It might be a bit intimidating looking at the high score list for the first time, because you'll see insane scores in the 10,000s or even 100,000s. These are not impossible to get, though, even without a whole lot of experience. The real key is with increasing the multiplier to insanely high levels, so that you can earn massive amounts of points per ball, and to keep that going for as long as possible.
Tip 5: You might think that you will fall off of the side of the level if you swipe too hard, but one thing that makes the game a bit easier is that you won't go off the side of the level, at all. You'll simply stop at the left end of the road or the right end of the road, depending on what direction you swipe. So swipe as hard as you want to so that you can move quicker.