Challenges
Small games that drill one idea each: binary, logic, sorting, searching, coordinates — plus tasks that build a real web page. Ages 10 and up, three to five minutes each.
Clearing a challenge earns experience, and some give you a hero the first time. A better score earns more, but finishing at all already pays 60%.
Challenges清單
Grid Coordinates
Each clue is an X,Y pair and a colour. Paint the right cell — but first work out which number is across and which is down.
How computers workgives a hero: Tomato Ninja+50 XP
Infinity Hunt
The six gems' coordinates are written at the top. Click those spots on screen — the same coordinate system you'll use in _圓(320, 180).
How computers work+60 XP🔒 Finish "Grid Coordinates" first
Decimal to Binary
Computers only know 0 and 1. Split a decimal number into 8 bits and see what each position is worth.
How computers workgives a hero: Q the Dino+60 XP
Binary to Decimal
The other direction: read a string of 0s and 1s and work out the number.
How computers workgives a hero: Chunky the Zombie+60 XP
Guess the Number
Guess a number from 1 to 100. Always guess the middle and seven tries is always enough: that is binary search.
Algorithmsgives a hero: Adventure Girl+70 XP
Sorting Race
Sort eight bars from short to tall by hand, then watch selection sort do it. Compare the number of steps.
Algorithmsgives a hero: Shadow Walker+80 XP🔒 Needs level 250 XP to go
Logic Gates
AND, OR and NOT are the smallest parts inside a computer. Wire them up to light the lamp.
How computers workgives a hero: Frozen Penguin+80 XP🔒 Needs level 250 XP to go
Program the Maze
Plan the whole instruction list before you run it. Steps are limited, so you will need a loop.
Algorithms+90 XP🔒 Needs level 3150 XP to go
Gem Detector
Six gems, eighteen bombs. Each bomb tells you how many steps the nearest gem is. Narrow it down; don't guess.
Algorithms+90 XP🔒 Needs level 250 XP to go
Letters Have Numbers
There are no letters inside a computer, only numbers. A is 65, B is 66. Decode the message and see why upper and lower case differ by 32.
How computers workgives a hero: Bit Mouse+70 XP🔒 Finish "Decimal to Binary" first
Stack or Queue
Two ways to store things; the only difference is which end they come out. The Back button is a stack; the printer queue is a queue.
Algorithmsgives a hero: Stacky Bear+75 XP🔒 Needs level 250 XP to go
My Card
The shortest possible page: a picture, a name, a few lines about you.
Web+30 XP
Roll Call
Names in an array, a loop to build the rows, and a live count of who is here.
Web+45 XP
Poll Results
Click to vote and the bar chart grows immediately: the shortest possible data-to-chart exercise.
Web+50 XP🔒 Needs level 250 XP to go
Calculator
Ten digits and four operators. Build the keys with a loop, keep the state in one variable.
Web+60 XP🔒 Needs level 250 XP to go
Pet Catalogue
Same data, different order, different website. Sort, filter, cards — that's the skeleton of every shopping site.
Web+70 XP🔒 Needs level 250 XP to go
Weekly Exercise Log
Log seven days, see the bar chart, and let an animation say the thing a chart can't: more or less than last week.
Web+75 XP🔒 Needs level 250 XP to go