Thank you
IntegerGeorge is another dev who contributed to RSDKv5 decomp and don't worry. It's just a placeholder for when you don't set your username.
You can change it by adding
username=your_name
under the
[Game]
section of your Settings.ini file
Also, not sure if the OP can edit it, but I released Version 1.0.1, which fixes Metal Sonic Boss Fight performance, and adds full mod support to the Vita version, as well as some other tweaks and bug fixes.
Game.suprx needs to go in
ux0:data/Mania
. Info on the releases page