Arcade
A stealth task is not complete merely because a target is reached if the mission also requires avoiding detection.
Read both halves of the mission
Impostor Stealthy Ninja describes infiltrating enemy bases, eliminating targets, and completing objectives without getting caught. That makes the approach and its exposure part of the task. Before moving toward a visible objective, inspect the nearby threats and the available route. A destination can be reachable in a geometric sense while still leaving the ninja in an unwanted encounter according to the actual level's detection rules.
Learn what the scene reveals about awareness
The record mentions blending into shadows but does not specify vision cones, sound, or a guaranteed hiding mechanic. Observe the signals actually shown when enemies become aware or when the character changes position. Use those signals to understand the current situation. A dark part of the artwork is not automatically evidence of safety unless the game establishes that relationship through its instructions or feedback.
Plan the position after the task
When considering an action at a target, also inspect where the ninja would stand afterward and what route remains available. This connects mission progress with continued concealment instead of treating the objective as an isolated click. After completing a step, read any updated instruction before continuing. The useful stealth plan explains the approach, the intended task, and the next visible space, while leaving exact detection behavior to what this game actually demonstrates.