Relaxation & Logic
Stillwater Locks
Nothing lost. Only rearranged.
Keep a small network of stone reservoirs in balance. Every pour runs until a chamber empties or fills; every drop stays in the system. Match all target water levels in Open water, or find a route through one-way channels in Lock keeper. Twenty-four verified studies per voyage grow from first openings to intricate passages, with no countdown.
- 01Open water
- 02Lock keeper
Made for a proper session.
- Two rule sets: free transfers between any pair, or a directed network of one-way channels
- 24 seeded, solver-verified puzzles per voyage, four chapters and three chamber-count settings
- Exact integer water levels, visible capacities and brass target markers; every drop is conserved
- Select source and destination with touch or keyboard; no dragging or fast reactions required
- Free undo and reset, a separate guided study and next-step route guidance with clear point costs
- Saved voyage checkpoints and completed logbook records, with score differences at matching settings
- English and Simplified Chinese, quiet canal artwork, adjustable original music and reduced-motion support
An untimed leisure puzzle. Scores describe route efficiency within this game, not health, sleep, wellbeing or a clinical assessment. The water model is deliberately discrete: a pour always runs to empty or full.