5 worlds of challenges, each adding a few new blocks and ending with a boss. Pass one to unlock the next. Start free: no account needed for the first few.
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World 1 · Logic Explorer
“Learn to think like a computer”
Give instructions in order: input, work it out, output
New: AskNew: TellNew: Create ValueNew: Change Value
The free challenges end here · Pro unlocks the rest
World 2 · Decision Maker
“Choose your path”
If this happens, do this; otherwise, do that
New: DecisionNew: Choose
World 3 · Loop Master
“Master repetition”
Repeat steps instead of writing them 100 times
New: RepeatNew: Repeat WhileNew: Count
World 4 · Code Builder
“Build reusable programs”
Work with lists of numbers and words
New: Change a ListNew: For Each
World 5 · Algorithm Hero
“Become a problem solver”
Combine everything to solve real problems
New: FunctionNew: CallNew: ReturnNew: ClassNew: Change a Field
Challenges for this world are coming soon.
Stuck? Every challenge has three hints. The first gives a gentle nudge, and only the last comes close to the answer, so try a little before you peek.
