Sonic Labyrinth - GG2SMS (Sega Master System) Hack

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Story

In his frustrations over Sonic the Hedgehog foiling his schemes, Dr. Eggman came to the realisation that if Sonic's speed was taken away, he would not be able to outrun his traps and stop him from taking over the world. As such, Eggman invents a pair of Speed Down Boots and switches Sonic's red sneakers with them while the hedgehog sleeps. Upon waking up, Sonic puts on the boots, and suddenly finds himself unable to run or jump.

With Sonic stripped of his speed, Eggman accidentally announces in an act of triumph that in order for Sonic to remove the boots, he must use the power of the Chaos Emeralds to deactivate the boots. Having been given clues on how to take them off, Sonic follows Eggman into his latest fortress on South Island, the Super Labyrinth, in order to locate the Chaos Emeralds using only his Spin Dash.

Gameplay

The game uses a 3D isometric overhead view similar to that of Sonic 3D: Flickies' Island. However, gameplay is restricted to a single button which is the Spin Dash. To use the Spin Dash, the player must press and hold either  or  to charge the move with the overhead arrows determining the strength of the charge, with four arrows being the strongest charge and no arrows being the weakest, then release the button to dash away in the direction Sonic is facing. While Sonic is rolling about, pressing  or  will make him skid to a halt. There is no jump button whatsoever and the only way to make Sonic airborne is through the use of obstacles.

The Super Labyrinth spans four Zones, each with four Acts. In the first three Acts, the objective is to collect 3 keys in order to be able to exit through the door which leads to the next Act. In these Acts, Rings do not appear to serve as Sonic's health. Instead, health is determined by the amount of time available and each hit from an enemy or hazard will shave 10 seconds off the clock. When time runs out, Sonic will lose a life. Fortunately, seconds can be added to the clock by collecting keys or by destroying enemies.

The fourth Acts are different as they begin with Sonic speeding downhill in a Scroll Zone (スクロールゾーン). In these sections, Sonic can be moved with   and  to collect Rings and avoid spikes, while repeatedly pressing  or  will make Sonic brake in order to slow his descent. Sonic can use the Rings collected in the Scroll Zone as protection from hits in the upcoming boss fight, as in most Sonic games, but Rings lost cannot be collected again. The Scroll Zones and bosses lack a timer and so can be tackled at the player's leisure. After defeating the Boss, a Chaos Emerald is awarded, meaning there are a total of 5 Emeralds which can be earned without any extra effort. To attain the good ending of the game, the player is also required to find the hidden Bonus Stage in Act 3 of the Labyrinth of the Sea.