Segments go from 100m to Old Site, Old Site to 2200m, and 2200m to Summit

Press S to go back by 1 segment, F to go forwards

Differences from old version:

• Game doesn't softlock if you press S or F during the chest opening animation
• Sum-of-best time doesn't clip off screen and is centered (regular segment time is also centered)
• Flag text is spaced more consistently