Dot Game

The goal of this exercise is to create a game. In the game, dots move from the top to the bottom of the screen. A player tries to click on the dots, and receives points when they are successful.

Guidelines for Completing the Exercise

• Your application should work in current Chrome.
• You can edit any file in the project, and add any assets you require (see below).
• You may look up anything you'd like.
• You should not use a JavaScript library.
• You must write at least the CSS necessary to achieve the basic layout of the game; you may also write additional CSS to improve the design of the game.
• The project is set up to use plain CSS, but you may add a CSS preprocessor if you'd like.
• Your finished code should be of a quality that you would submit to your peers for a code review.
• If you have questions, respond to the original email where the exercise was shared with you; your questions will be answered within one business day.
• When you are ready to share your work, respond to the original email; please include a link to this page, and the approximate amount of time you spent on the exercise.

Building the Game

• The game starts when the page loads.
• When the game starts, a new dot should appear on the playing area.
• Dots fall smoothly at a constant rate. A player should be able to use a slider to control the speed at which dots fall. When the slider is changed, all dots including currently falling dots and newly created dots should change speed.
• At the slider's left-most position, dots should fall at a speed of 10px per second, and at the slider's right-most position, should fall at a speed of 100px per second.
• New dots appear at a random horizontal position at the top of the box. A dot should not "hang" off the left or right edge of the screen. Dots should vary randomly in size from 10px in diameter to 100px in diameter.
• When a player touches or clicks a dot, the dot should disappear from the box and a new dot should appear at the top of the page 1000ms later. The score should be incremented by a value inversely proportional to the size of the dot, with 10px dots worth 10 points, and 100px dots worth 1 point.
• A new dot should also appear every 1000ms.

You can view your running application by clicking the "Show" link in the upper left-hand corner of the page.

Creating and Using Assets

To create a new asset, click on the "assets" directory in the front-end section; drag the file from you computer to the browser window.

To use an asset, click on the "assets" directory in the front-end section; then, click the "Copy URL" button to get the asset's URL.