Hey there! This is a known issue on our side. The team is currently working on it. The workaround for now is to put yourself in flight mode so you can launch the game without the delay ;D
— Dotemu Support (@DotemuSupport) June 16, 2022
Switch users may run into a White Screen when trying to launch the game. The current work around is to disable wifi via airplane mode and that will allow the game to launch.
After the game is open you may be able to re-enable wifi without issue.