Virtual Pet

A JavaScript implementation of a Tamagotchi-style game

Play here

Premise

Choose between different animals and give your pet a name.

Your virtual pet tracks the following:

• Health
• Hunger
• Happiness
• Love

Health starts full, with 10 points. It increases by 1 with each feed.

Hunger starts at 5, with a max of 10 points. It ticks up 1 every 4 hours.

Happiness starts at 0, and has a max of 10.

If Hunger is at 0, tick Health and Happiness down 1 every hour.

If Hunger tick happens while full, add current Happiness to Love.

If Love is 100, pet is immortal.

Features

Buttons for the following actions will appear at timed intervals.
When they are used, the timer starts for generating another button.

• Feed
  Interval: 1 hour
  Take away 1 unit of hunger from your pet

• Play
  Interval: 10 minutes
  Could be a minigame?

How

I'm using localStorage to hold datetime values and update the relevant stats when the user revisits the page. This works for full reload and for just reopening the page, e.g. switching tabs, minimising the browser.