Little Fixes and pathes — Manda Duo Steam update #1286184

Dear players: This update brings the following changes: First, the game name has been changed to "Manda Duo". This new name highlights the concept of "two-person team" and also avoids possible infringement. Second, the game BGM that was criticized as 难听 has been replaced. Third, the pixel specifications of the platform have been unified, and the overall art style is now more unified and neat. Come and experience the brand new "Manda Duo"!