Match the gameplay settings
Pip, Moss and Ember have different pace, turning circles and vertical drift, so equal scores with different companions are not the same task. “Today” is also ambiguous across time zones or delayed messages; use the date shown in the invitation. A generated challenge link carries the relevant version, course and companion. Check that the recipient actually loaded those settings rather than falling back because something remains locked.
Account for the view ahead
ORBIT uses a fixed logical height and derives the field width from the visible stage’s aspect ratio. A wide window can therefore reveal a different amount of horizontal space from a tall phone view. The obstacle pattern can match while the advance view differs. For a friendly comparison, agreeing on portrait or landscape is more honest than claiming the same date alone guarantees identical conditions on every screen.
Choose the kind of comparison you want
A casual invitation needs only a recognizable target and enough context to enjoy taking turns. A more structured comparison might also agree on attempts, orientation and companion beforehand. The game does not enforce those informal rules or provide a verified global ranking. Forest selection changes presentation rather than course geometry, so matching it is optional unless you want a similar visual setup. Report a result as a score on a named course with a named companion; that is precise without turning a friendly score card into evidence of a universal skill ranking.