Bitwise

Duolingo-style revision for Cambridge IGCSE Computer Science (0478), made by realluked.

Play it here: https://realluked.github.io/bitwise/

• 45 bite-size lessons covering the whole syllabus, Paper 1 and Paper 2
• Exam hall with exam-style questions and mark schemes
• 15-mark practice: write full programs for Paper 2 scenarios, marked by an AI examiner using the Cambridge levels
• Revision notes for every topic, with space for your own
• Lightning rounds, a mistakes review and levels from Bit to Zettabyte
• A global XP league with usernames
• A feedback form to report problems and suggest ideas
• Free, no sign-up, works on phone and desktop

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© 2026 realluked. All rights reserved. See LICENSE. Not affiliated with Cambridge International.