Video Instructions:

Text Instructions: You can use this mod for space%. To add it to Getting Over It, go to your GOI folder, can be easily accessed by right clicking the game in your library and doing the following: Properties>Local Files>Browse Local Files>GettingOverIt_Data>Managed Then just replace the Assembly-CSharp.dll that is already there with this one, and make sure to get rid of the extra text at the end of the file name on the savestate mod so it is just "Assembly-CSharp.dll"

Once you have the mod installed, press Esc, and in the top left you should see a GUI. Select the "Space Gravity" option. Make sure to not pause the game to do this before a genuine run attempt, because any pauses or quit outs will lead to an invalid run.