20,000 Leaks

Player stands inside a glass bubble that separates the player from the sea. Using hands, feet, and head player side- steps or lunges to reach and close the leaks that are generated by fish and sharks crashing into the bubble.

Game Characteristics

Game Selection

Game Entry Point Fixed or variable levels available when a player enters a game

Flexible entry point: nine levels:

  • 3 beginner
  • 3 intermediate
  • 3 advanced
Game Start

Player raises hand

Player or Game Driven? Player driven games rely largely on the actions of the player and wait for a response before continuing; Game driven environments progress independent of the player’s response

Player driven: The next leak appears only after the previous leak is plugged.

Stability Maintain a posture/orientation of the trunk and/or limbs to: allow movement of other body segment(s), hold body/segment(s) in a required game position, and/or to resist perturbations

YES: Standing.

Mobility Movement of body segments to reach a target, avoid obstacles, assume required positions, or to “drive” or “steer” the game task


  • Arms
  • Legs
  • Trunk
  • Head



Spatial Accuracy The type of accuracy required for aiming movements for which spatial position of the movement’s end point is important to task performance

YES: To plug leaks.

Temporal Accuracy The type of accuracy required of rapid movements for which accuracy of movement time is important to task performance


Game Duration


Cognitive Operations Executive functions of planning, response selection and switching attention


  • Select placement and position of arms, legs, and head to plug the leaks
  • Sounds alert player to differing extent of upcoming cracks



  • Choice of body part used to block leaks
Augmented Feedback Information from an external source that is intended to enhance or replace the intrinsic feedback that comes from a person’s own sensory, visual, and auditory systems


  • Body parts light up when appropriately placed over a leak
  • Success of leak block: water stops or continues to flow.
  • Pins are collected with successful plugs
  • Counter increases with collection of pins
  • Colour of medal indicates success
  • View score


  • Sound indicates correct leak plugging
  • Sound indicates impending end of game
  • Sound indicates collection of pins
  • Sound indicates medal gain
  • Sound indicates plugging of challenging leak
Progression The extent to which the physical and/or cognitive difficulty level of the game progresses within a single trial of game play

A player experiences greater physical and cognitive challenge within a level as a greater number of leaks appear over time.

Game Score Performance indicators reflecting a player’s success

Reflects number of pins collected. Medal reflects game performance.

Game Modification Potential modifications that can be made in the virtual environment, the physical environment or the task

Game modifications can be categorized as physical environment, virtual environment and task.

This section of the resource is planned as an interactive wiki so that users may add their experiences. An example of a physical environment modification is changing the support surface. An example of changing the virtual environment is eliminating the volume. An example of changing the task during Reflex Ridge is telling the player not to jump to decrease the physical challenge of the game.

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