Amidar - Enemy Movement

Enemy Movement

The enemies (and bonus stage pigs) in Amidar move deterministically; this is described in the game as "Amidar movement". Each normal-type enemy moves vertically from the top to the bottom of the screen, and then back to the top, and so on. While moving in a constant vertical direction, the enemy will take every horizontal turn available. Each level has one special enemy (the "Tracer", colored white) which, at the beginning of each stage, simply patrols around the perimeter of the gameboard in an anti-clockwise direction. However, following a certain number of "laps", The Tracer will begin to relentlessly pursue the player by following the path their on-screen avatar takes around the level. Since the Tracer moves at the same speed as the player character, but does not mimic any pauses or hesitations the player makes, gameplay now becomes much more frantic, as too many mistakes will allow the Tracer to catch up. Later levels increase difficulty by adding more complex game grids, adding more enemies, and reducing the delay before the Tracer starts pursuing the player, until eventually it starts its pursuit after a single lap at the beginning of each new level.