Flying high does not make the island safe. Food runs out, stamina drops, and sooner or later you have to land somewhere that may already belong to a hungry predator. Velociraptors, Spinosaurus and T. rex turn otherwise ordinary trips into rather unpleasant surprises, while fog, storms and darkness can make navigation trickier than expected.
Upgrades give the Pteranodon better tools for attacking, escaping and staying airborne, so encounters with larger creatures feel less hopeless. The unlimited money version removes much of the usual resource grind, letting you spend more time testing abilities, exploring the island and picking fights from above. A nice fit for players who enjoy dinosaurs with a lighter survival loop.