on jumping and exploration, as each track has multiple paths and hidden areas. The tracks, although original creations, are thematically based on the art style and environments of classic Sonic games such as Sonic the Hedgehog's "Green Hill Zone" and Sonic the Hedgehog 2s "Chemical Plant Zone". Players can also race through each track in reverse. During each race, the player is able to collect items scattered across the track, bestowing advantages. Rings, a staple Sonic series item, are abundant; the player can exchange rings to gain a temporary speed boost or open doors leading to short cuts or special items. "Item Panels" give a random temporary advantage, such as a speed increase or shields that grant abilities such as being able to run across water or attract nearby rings. Collection of other special items, such as "Sonic Tokens" and the Chaos Emeralds, may lead to the unlocking of secret characters. Sonic R allows the player to select the type of weather seen during races. There is also a "Time Attack" mode, where the player races solo to get the fastest time, and a two player competitive mode, increased to four-players in the Gems Collection port. In addition to the standard time trial mode, there are two others: "Get 5 Balloons", where five balloons are scattered across the track and must be located, and "Tag 4 Characters", where the player chases and must catch four others. Characters Sonic R features ten playable racers, each with unique attributes and abilities falling in line with their usual abilities. Sonic the Hedgehog is the fastest and can "double jump" (being able to perform a second jump in mid-air). Tails is able to fly through the air for a short time, and Knuckles the Echidna can glide through the air upon jumping. Amy Rose, the last initially available character, drives a car, allowing her to hover over bodies of water and receive extra speed from driving over boost spaces. Secret characters include Sonic's archenemy Dr. Robotnik, who flies in his Eggmobile hovercraft and resists differences in terrain; robotic clones of Sonic (Metal Sonic), Tails (Tails Doll), and Knuckles (Metal Knuckles); Robotnik's robotic assistant EggRobo; and Super Sonic, a faster version of Sonic powered by the Chaos Emeralds. Amy's car, Dr. Robotnik's Eggmobile and Eggrobo are the only characters that cannot jump unless they hit a spring pointing up. Instead of the jumping ability, Amy's