As the original game is infamous for its poor quality, the PC port aims to fix its issues, as well as restore content scrapped during development.

[2] Players can also choose between various cosmetic options, for example, make Sonic's animations resemble those from a 2005 prerelease showing.

[6] Because of it, the game received negative reviews upon release for its story, controls, camera, bugs, and long load times.

"[2] The game was never released on Windows personal computers, so some Sonic fans have made unofficial efforts to develop a port.

[2] Beginning in 2015,[7] a group led by developers Gistix and Mefiresu worked on a port of Sonic the Hedgehog using the Unity game engine, and released a number of demos between 2017 and 2018.

[2] He abandoned the World Adventure Project after realizing he had the ability to remake Sonic the Hedgehog in Unity and thus be able to experience it, despite the low quality of his computer setup.

[2] Moris started with the few pieces of the original code that are accessible, and began by remaking each level while ignoring or hiding the problems that are present in the official game.

"[2] A third demo was released in July 2020 which added the rest of the stages in Sonic's story,[13][14] followed by an update in August 2020 that addressed numerous bugs in the previous build.

A fourth demo was released in September 2021 that added Shadow and all of his campaign levels,[16] followed by a bugfix update later that month.

[18] Reviewing the first demo, Nathan Grayson of Kotaku wrote that while Project '06 still suffered from flaws such as poor level design, it was "already a marked improvement" over the original game, with fewer glitches and a better feel.

[1] Nick Summers of Engadget called Project '06 a "remarkable feat" and said it demonstrated that Sonic remained culturally relevant despite poorly received games.