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Written by: Jonathan Reis on
A practical event model for distinguishing a completed row, column, or block from the ninth correct placement of one digit, then routing both through sound and haptic feedback.
Written by: Jonathan Reis on
A practical strategy for launching Sudoku, Nonogram, Hashi, and other logic puzzles as independent products before connecting them in a shared collection.
Written by: Jonathan Reis on
A practical method for comparing mobile product ideas using competitors, monetization, distribution, personal fit, and evidence instead of category size alone.
Written by: Jonathan Reis on
Why the declarative Skia renderer with 81 React components per cell struggled on low-end devices, and how reimplementing the board with Skia.PictureRecorder + <Picture> removes the reconciler from the render hot path.
Written by: Jonathan Reis on
A solo developer walks through a Nielsen-based heuristic evaluation of a published React Native game, prioritizes the findings, and measures the score change after fixing them. Practical process for indie devs without a UX team.
Written by: Jonathan Reis on
A win-screen celebration overlay fell behind the result cards and dropped too fast. The cause was React Native's sibling paint order, not a missing z-index. Here is why zIndex alone is not enough on Android and how we fixed both bugs.
Written by: Jonathan Reis on
Our Sudoku blocked pencil marks that conflicted with the row, column, or box. It felt like a safety check. It was actually a free solver that told players which numbers were still possible. Here is the fix and the principle behind it.
Written by: Jonathan Reis on
We wanted physical-keyboard input in a React Native game on Android. The classic hidden TextInput trick failed under Fabric because showSoftInputOnFocus is ignored. adb proved it, and a config plugin fixed it for good.
Written by: Jonathan Reis on
A border on an overflow-hidden container silently shifted our Skia board and un-centered every digit. Here is how screenshots, not eyeballs, found the real cause in a React Native game.
Written by: Jonathan Reis on
A developer shortcut hidden behind __DEV__ disappeared exactly when we needed it in a release build. Here is why that happens in React Native and how we moved the gate to runtime config.
Written by: Jonathan Reis on
How we gave a template-looking Sudoku a bold art direction by changing the theme tokens first, sharing them with our website, and staying inside a low-end performance budget.
Written by: Jonathan Reis on
How Daily Sudoku added a persisted vibration toggle, reused gameplay feedback events, and kept Web bundling safe while using expo-haptics on native.
Written by: Jonathan Reis on
How one React Native sound setting ended up owning gameplay effects, Android tap feedback, and a double-toggle bug in a nested Switch.
Written by: Jonathan Reis on
How we measured React Native response time from tap handler to state update and paint when frame stats did not explain what players felt.
Written by: Jonathan Reis on
How we tested a Skia Sudoku board behind config without deleting the React Native renderer, accessibility layer, or rollback path.
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