Liquid War — an army that follows your cursor

Your army is a few thousand fighters and you do not command any of them. You move one cursor; every fighter of your colour floods through the maze along the shortest path to it. Where two colours meet nobody dies — the loser changes sides, so every fight you win makes you bigger and the map is a tug of war over one fixed population.

You move a cursor, not an army. Every fighter of your colour walks the shortest path through the maze to wherever the cursor is, recomputed continuously. Walls, dead ends and doorways are the whole game.
Nobody dies. A fighter pushed to zero health flips to the colour that hit it, at low health. The population on the map never changes — it only changes hands.
Health is position. A fighter that walks freely heals; one pressed against an enemy front does not. Fresh fighters arriving behind a line are what wins it.
So: never feed a front. Trickling into a corridor loses the corridor. Pull back, let the queue bunch up, then arrive all at once — or leave and take what they left behind.
Win by owning every fighter on the map, or by being the largest army when the clock runs out.

Mouse, touch or arrow keys / WASD. Space pauses, Esc opens this menu, R restarts the same battle.