The developer guide can be found here.
The player moves the cannon by either dragging on the screen. When the player drags on the screen, the cannon will point towards the location of the user's finger. When the user lifts the finger, a ball should fire.
Alternatively, tapping on the screen will immediately point the cannon towards the direction of the user's finger. A ball will also fire if the user chooses to tap.
When the game is active (a ball is shot), the cannon is still can be aimed using the methods above.
To win, the user needs to clear all orange pegs. A game should therefore have at least one orange peg to be considered playable (without auto-winning when the game starts).
You lose the game if you run out of red balls (game balls). You start with 10 game balls. Every shot decreases that amount by 1. Note that if the ball enters the bucket the user will get a free ball (number of balls left increases by 1).
You also can lose the game if the timer for the game expires. You will have 5 minutes to clear all orange pegs to win the game.
Once the game is won, a winning alert and sound is played. The user can tap on the Okay button to go back to the previous page.
Once the game is lost, a losing alert and sound is played. The user can tap on the Okay button to go back to the previous page.
A level with arbitrary height can be created by scrolling up/down in the level designer.
Drag with one finger to scroll.
A offset counter is shown in the level designer at the bottom left to indicate the current offset.
A offset of zero indicates that the level the level cannot be scrolled further down.
A level can be infinitely high but it is recommended to create a level that is winnable within 5 mins due to the game timer.
Tapping on the peg/block should bring up a rotation slider at the top of the level designer.
Dragging that slider will allow you to rotate the pegs/blocks from 0 to 360 degrees.
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Pegs
- Tapping on the peg should bring up a radius slider at the top of the level designer.
- Dragging that slider will allow you to change the radius of the pegs. You can increase the radius by 2 times (i.e. 4 times the area).
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Blocks
- Tapping on the block should bring up a width and height slider at the top of the level designer.
- Dragging that slider will allow you to change the width and height of the blocks. You can increase the width and height by 2 times each. The maximum area will therefore be 4 times the original area.
When a block is tapped, it can be make to oscillate using the oscillate switch found at the top right of the level designer.
Once oscillation is activated, a gray circle will be shown on top of the current selected block. The 4 corners will have small circles that can be dragged to adjust the springiness of the block.
The larger this radius, the "looser" the springiness will be.
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Sound effect and music
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A background music for the level designer and main menu.
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A background music for the gameplay.
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Two click sounds that get played when various UI elements are tapped.
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Cannon shoot sound.
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A sound when a peg is hit.
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A sound when a block is hit.
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A sound when the bucket is hit (free ball sound effect).
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A sound when the game is won.
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A sound when the game is lost.
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A explosion sound effect when a blue peg is hit (Ka-Boom powerup).
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A ghostly sound effect when the spooky ball reappears at the top.
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A shape shift sound effect if the shape shift powerup activates when hitting the gray ball.
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A flash sound effect if the flash powerup activates when hitting the yellow ball.
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A rain fire sound effect if the rain fire powerup activates when hitting the pink ball.
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Note that for all these sounds, the sound will only be played if the same sound effect is not already being played. For example, if the game ball hits one yellow peg (causing one flash sound effect to be played) and hits another yellow peg, the sound effect for the second yellow peg flash powerup might not play as the previous sound effect might still be playing.
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For all powerup sound effects, it will only be played if the powerup is activated.
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Score system
- Pink Peg: 1 point
- Blue Peg: 10 point
- Gray Peg: 50 point
- Orange Peg: 100 point
- Purple Peg: 500 point
- Yellow Peg: 1000 point
- Multiplier is exactly the same as in the problem set website under the appendix section.
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Displaying the number of pegs remaining during gameplay
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Displaying the number of balls left (red balls) remaining during gameplay
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Displaying the number of pegs/blocks added in the level designer
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A timer that results in a lost game when it expires. (Set to 5 minutes)
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Additional Powerups
- Flash
- The game ball has a change to have its speed doubled if a yellow peg is hit for the first time.
- This powerup only activates if the ball is not already travelling too fast.
- Shape Shift
- The game ball has a change to have its size changed when a gray peg is hit for the first time.
- Note that the change in size might not be noticeable sometimes depending on the random size chosen.
- Rain Fire
- 4 additional helper game balls (dark gray in color) will be spawned if the main game ball (red in color) hits a pink peg.
- Note that there can only be 4 helper game balls at any given time. So if the game ball happens to hit multiple pink pegs, the powerup might not activate depending on the number of game ball present.
- The helper game balls disappear when the main game ball exits the game screen.
- Helper game balls can activate some powerups like spooky ball and ka boom.
- If the helper ball activates the spooky ball powerup, the main ball becomes spooky (i.e. the main ball will reappear at the top after it exits).
- Helper game balls cannot activate rain fire because of point 2.
- Helper game balls can fall into the bucket. If they do, all balls will be removed (including the main ball) and you get a free ball and you can shoot again.
- Helper game balls themselves cannot get affected by shape shift and flash power ups.
- All helper game balls activated powerups will affect the main ball.
- Flash
The test plans can be found here.