Hi there,
So this is the main TRIP up for users of the Round Display,
The TFT_eSPI.lib original that is installed by default in Arduino IDE is NOT compatible with the round display. The USER is required to remove current one and Install older compatable one from the LINK Seeed_Seraphina is giving. Or go look at the DEMO here I uploaded after following the directions to the LETTER (a MUST)
HTH
GL 
PJ