CodeRealm

Guide Bit the robot to the star by snapping together command blocks — move, turn, repeat, and if. Watch your program run, then peel it back to see the real Swift code underneath.

Level 1

Build a program

The heart of CodeRealm — assemble blocks, run them, and reach the goal in the fewest blocks.

Command Builder Snap move / turn / repeat / if blocks together to drive Bit to the ★. Run, step, and reset — plus a “Show Swift” peek. · 24 puzzles Debug It · new A program that almost works — run it, spot where Bit goes wrong, and fix the one broken block. · 3 puzzles

Practice the concepts

16 kits from algorithms and loops up to recursion and software design — a short round of questions with a hint whenever you get stuck. Your progress stays on this device.

Kit 1: Algorithms & Sequences Algorithms & Sequences · grades 4-5 · 25 questions Kit 2: Loops & Patterns Loops & Patterns · grades 4-5 · 25 questions Kit 3: Conditionals & Logic Conditionals & Logic · grades 5-6 · 25 questions Kit 4: Variables & Data Types Variables & Data Types · grades 5-6 · 25 questions Kit 5: Functions & Decomposition Functions & Decomposition · grades 5-6 · 25 questions Kit 6: Debugging & Testing Debugging & Testing · grades 6-7 · 25 questions Kit 7: Data Structures Data Structures · grades 6-7 · 25 questions Kit 8: Advanced Algorithms & Complexity Advanced Algorithms & Complexity · grades 7-8 · 25 questions Kit 9: Object-Oriented Concepts Computer Science · grades 6-7 · 25 questions Kit 10: Recursion & Recursive Thinking Computer Science · grades 6-7 · 25 questions Kit 11: Algorithms & Efficiency Computer Science · grades 7-8 · 25 questions Kit 12: Software Design & Collaboration Computer Science · grades 7-8 · 25 questions Kit 13: Cross-Topic Connections Functions & Decomposition · grades 5-6 · 25 questions Kit 14: Real-World Applications Functions & Decomposition · grades 6-7 · 25 questions Kit 15: Misconceptions & Reasoning Functions & Decomposition · grades 6-7 · 25 questions Kit 16: Advanced Synthesis Functions & Decomposition · grades 7-8 · 25 questions

Play together

Two ways to keep going — a same-device match with friends, or a trail through every kit. On-device only; nothing leaves this device.

Coder Duel (pass-and-play) 2–4 players take turns on one device — same questions for everyone, highest first-try score wins. Code Quest — follow the map → A progression trail through every kit. Clear each stop of real practice, then move on.
CodeRealm mascot

Meet the cast — the characters who teach this

Each one stands for an idea you’ll practice. Tap a character to read their illustrated story and hear their audio drama.

Explore all the stories →

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