Heh, the bog is a valid ending too! Just means your wisp will be remembered somewhat differently in lore than it might otherwise - in all there are seven possible ending types, though most need at least two people to end somewhere other than in the swamp. Of the three I think the knight is probably the hardest to do. Would love to hear it if you manage to save all of them.
Seems the hotkeys apply to Firefox and Edge as well - and I meant it's possible to use the arrow keys rather than 'WASD' to avoid the issue, though not pulsing when moving forward is also an option... but I like chasing the enemy wisps around after they've lured one of my people into the bog!
