Sonic the Hedgehog is a platforming action video game. Developed by Sonic Team in 1991, the blue blur himself would become one of gaming's universal icons, and became the first series to stand as a serious rival to Nintendo's Mario series, flaming the legendary console wars.

A classic 2-D side-scrolling platformer, you control Sonic, a blue-colored hedgehog that runs pretty darn fast across the stages (zones as they are called in the game). Scattered throughout the zones are golden rings that Sonic can collect, which allows him to not only take damage, but allow access to special stages. If completed, the special stage will grant Sonic one of six Chaos Emeralds.

Dr. Ivo Robotnik, an evil genius, realizes the power of the Chaos Emeralds, and wants them for himself. As such, Robotnik traps the innocent woodland creatures of South Island. In response, Sonic attempts to free the creatures and collect the emeralds for himself in order to stop Robotnik's plans.

Sonic Hacking Contest 2020 Description:

Sonicu The Cubehog is a Sonic The Hedgehog 1 Hack that has the main objective of having similar gameplay to another game called "Geometry Dash". This Hack is hard, but playable, each act of almost all zones offers a difficulty that you may suffer or not, sometimes it requires precise jumps to reach certain platforms or to dodge obstacles.
Each zone offers not just unique moments to pass, but has a level design and palette colors that can actually bother you.
...
That's it, enjoy.

The Main Description:

This is the Sonic 1 hack that C.A.L.D.M_2001 made in 2020, now available on Romhacking as a patch (xdelta). In case you want another option, you can also download it from the SHC Vault of 2020.

Database match: Sonic The Hedgehog (USA, Europe)
Database: No-Intro: Genesis (v. 20210226-213851)
File/ROM SHA-1: 6DDB7DE1E17E7F6CDB88927BD906352030DAA194
File/ROM CRC32: F9394E97

View in The Vault