Overview
The Security Door game puts a ten-number dial in front of you with a segment sweeping around it. Press Space when the segment covers the highlighted number to enter one digit of the passcode. Five digits open a lock; four locks open the door. Each lock is harder than the last: the segment shrinks from a third of the dial to a tenth, and the movement changes from a steady sweep to stop-and-go, bursts, swings around the target and fast-then-slow laps. A miss resets the lock you are on, which is what the real assessment is watching: do you stay patient and precise, or start guessing.
Example: lock B, third digit
Lock A is open and lock B has two digits entered. The blue segment sweeps the dial; press Space when it covers the highlighted 7. The loop stops it on target once, lighting the third digit, then sweeps on for the fourth.
Example animation
A
B
C
D
Stop segment Space
Lock B, digit 3 of 5: steady sweep, segment 1.5 numbers wide.
Lock B’s segment is 54 degrees, one and a half numbers wide, on a steady sweep. A miss here would reset lock B to zero digits; lock A stays open.
This is a looping animation of the game screen, not the live game.
Play Free Example
Game Phases
1
Find the target
One number on the dial is highlighted. The blue segment is moving; watch its pattern for a moment before you commit.
2
Stop the segment
Press Space (or the button) when the segment covers the target. A hit enters a digit; five hits open the lock.
3
Survive the miss
A miss resets the current lock to zero digits and the dial restarts, with the timer still running.
4
Open all four
Locks A to D get narrower segments and less predictable movement. The run ends when the door opens.
We are not affiliated with Arctic Shores or Maven Securities; all information provided is for educational purposes to help students prepare for interviews.
Scoring
hit
Digit entered
Stopping the segment on the target adds one digit to the current lock.
reset
Miss
Stopping it anywhere else resets the lock you are on; earlier locks stay open.
time
Score
Runs are compared on total time to open the door; lower is better. Accuracy and best streak are shown alongside.
There is no time limit, so the timer is only there to compare runs. Segment widths: lock A 108 degrees, lock B 72 narrowing to 54, locks C and D 36 degrees (exactly one number). Because a miss costs the whole lock, the best strategy is to wait for a readable moment in the pattern rather than pressing early.
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