Proto:Sonic the Hedgehog 2 (Genesis)/Beta 5

Cheat Codes

 * Level select is activated with A + Start. This is identical to the previous build visually, and blacks out Sonic due to a palette glitch.
 * Debug is activated by holding A when selecting a level at the title screen.
 * Debug can also be activated by holding A when you die.
 * Debug can also be activated by holding A when a level begins.

General Differences

 * The game has a different title screen from Beta 4, which is the same title screen as the final.
 * "Sonic and "Tails" In" (or Sonic and Miles, depending on territory)
 * As in Beta 4, debug mode is present, but in the debug counter only. You can't turn into anything.
 * It is not possible to transform into Super Sonic without hacking, even with all 7 Chaos Emeralds.
 * Sonic no longer dies if he touches spikes while invincible.
 * Hidden Palace is still missing. It's still listed on the level select screen, but selecting it does nothing.
 * In the level select menu, the Sonic the Hedgehog 2 logo covers zone list.
 * The item placement in Aquatic Ruin Zone isn't complete.
 * Metropolis Zone Act 1 does not have an end level panel, leaving it impossible to finish.
 * Wing Fortress Zone is different in the beginning, and contains a cheap death in which you are pushed off the starting platform. This is the last beta where it is different from the final.
 * In Death Egg Zone, it is possible to run completely past Robotnik's mech before he gets in, debug not required. If you die, he'll keep doing whatever it is he was doing.
 * In the ending (ending is available normally in this version), after Tails catches Sonic on the wing of the plane, they fly off to the right and then the game starts over.
 * In the Special Stage, the "Not Enough Rings..." sound is different from the final and remains that way through Beta 6; it was erroneously the "Cool!" sound in Beta 4. In the final, that sound is used in Casino Night Zone's boss.
 * Spike behavior is the same as the original Sonic.

Bugs

 * Sometimes, when performing a Spin Dash, Sonic will do it with the running animation.
 * A silly Chemical Plant Zone glitch related to the camera scrolling after death is in this beta.
 * In the boss arena of Oil Ocean Zone's boss, the oil acts as a bottomless pit.
 * In Sky Chase Zone, stand on a turtle, and Sonic can scroll off screen if you wait.
 * When Tails gets hurt and lands in Sonic and Tails mode, he uses Sonic's height properties.