StarDoku: Critter Logic

Good Samaritan Software

Contains adsIn-app purchases

About this game

Find every hidden critter using pure logic!

StarDoku is a cozy placement puzzle where every row, column, and colored region needs exactly one critter—and critters can never touch, even diagonally. Every board has one unique solution, so careful deduction always wins.

Learn as you play

Start with an interactive tutorial that walks through real deductions. When you want help, step-by-step hints prioritize useful X marks and explanations before revealing a critter.

Make it yours

Choose River Otter or Highland Cow at the start, then earn additional critter looks as you progress. Each theme brings its own character, animation, color, and sound while keeping the same fair puzzle rules.

Built for comfort

• Adjustable double-tap timing
• Protanopia, deuteranopia, tritanopia, high-contrast, and monochrome palettes
• Clear haptics and non-blocking sound feedback
• Personal scores, combos, records, and gameplay statistics
• A once-per-level Oops recovery for accidental misses
• Hundreds of offline logic puzzles with a smooth difficulty curve

Optional extras

Watch an optional rewarded ad for a hint, reveal, or continue. The free game may also display banner and occasional post-level interstitial ads. A one-time Remove Ads purchase removes banners and automatic interstitials; optional rewarded bonuses remain available. Hint, reveal, and continue packs can also be purchased.

No account is required. Campaign progress and personal gameplay statistics are stored locally on your device.

Settle in, meet your critters, and give your brain a satisfying daily stretch.

What’s new

A major accessibility and gameplay update:

• Undo now restores the latest tap or an entire drag in one step; mistake recovery can restore a lost life once per level.
• New Explicit Mark X / Place Mascot controls.
• Better VoiceOver, TalkBack, voice navigation, board actions, hints, and tutorial guidance.
• Larger Text and responsive layout improvements.
• Region-letter cues, stronger contrast, color-independent play, and Reduced Motion support.