Warning: this version is said to be "unstable" by the hack's creators:

"Due to a (very) temporary cancellation of the project, the latest release was made in an incomplete state, and as such, contains various issues ranging from minor to major, which can possibly hinder gameplay under certain circumstances. This is far from an ideal release, and we do not claim it to be one. To play a "complete" version, please wait for the next release, or see version 3.0 for the Sega Mega Drive / Genesis."