一间完全建立在无需密钥的公共 API 之上的游戏室：一台问答反应堆、完整的宝可梦图鉴属性克制矩阵及进化树、一个根据你的姓名猜测年龄与出身的预言机、一座确定性头像锻造炉、xkcd 漫画档案、一间鸡尾酒实验室，以及一场永无止境的维基百科漫游。
A Pokémon card-battle duel against the computer — pick a stat, the higher number wins both cards, play until one trainer holds the whole deck.
A real word-search generator and player: pick a theme and a hidden word list is packed into a letter grid along all eight compass directions — forwards, backwards and diagonal — with the gaps sprinkled in decoy letters, then you click-drag across straight runs to snap-select and cross off every word against a ticking best-time clock.
Climb from one word to another a single letter at a time — each rung a real word, every puzzle solvable, with the shortest ladder waiting to be found.
A keyboard sprint against a ghost pacer — type a curated literary passage as the words light up correct or wrong, and try to out-run a metronome cruising at your chosen words-per-minute.
A full Sudoku studio: a backtracking generator fills a complete grid, then carves cells away while a uniqueness-checking solver guarantees exactly one answer — play with pencil marks, conflict flagging, number highlighting, a logical hint, an instant solve, undo and a timer, across four difficulties seeded so any puzzle replays.
The classic n-puzzle, rebuilt: slide numbered tiles — or a slice of a procedurally-generated flow-field painting that is different every game — into the empty cell to restore order, with a shuffle that is provably always solvable, whole-row shoves, a smart hint, and a confetti finish.
The classic memory duel: four glowing pads sing a growing melody of light and tone, and you must echo it back note-for-note — each round adds a step, with strict, speed, and 6-or-9-pad modes to push your recall past breaking.
A reflex arena that clocks the exact millisecond your finger answers the green flash — best-of-five averaged, ranked against the human bell curve, with a Go/No-Go trap and a choose-a-side twist.
A breakneck mental-arithmetic arena: clean-integer sums, differences, products and quotients that ramp from single digits to two-step chains as you streak — score by speed, accuracy and an escalating combo, with a Sprint clock, a Marathon survival run and per-operation drills.
The classic toggle puzzle, with its secret revealed: pressing a cell flips it and its four neighbors, and your job is to darken the whole grid — but every board is really a linear system over GF(2), so a one-click SOLVE computes the minimal press pattern by Gaussian elimination, and a light-chasing demo shows why some sizes leave boards you can never clear.
The addictive guessing game, played with the whole planet — two nations face off and you call whether the challenger ranks higher or lower by population or land, chasing one endless streak.
A geography game: two world cities are pinned on the map — guess the great-circle distance between them, then watch the haversine arc sweep across and score by how close you came.
A concentration game stitched from the world’s flags — flip the cards two at a time, hold every matching pair in your head, and clear the board in as few moves as you can.
A fast-fire geography gauntlet drawn live from the world’s 250 nations — name capitals, read flags blind, weigh populations and trace borders, ten questions to a round.
A perception arena that probes your eye for color — spot the odd swatch in a grid, mix RGB to chase a target, and recall a flashed hue from a lineup, all scored by true CIELAB ΔE color distance as the differences shrink toward your just-noticeable limit.
A timed memory duel against the atlas — pair each flag with its capital before the clock runs down, with rounds that pile on more nations and harder regions the longer your streak survives.
A frantic letter-twisting word hunt — scramble a rack of seven tiles and race the clock to unearth every hidden word before time runs out.
一场穿行维基百科的超文本漫步——在词条之间跳转，看着你那条奇异的路径化作一道不断延伸的轨迹自行勾勒出来。
完整的宝可梦属性克制表，实时取自 PokeAPI，以 18×18 矩阵呈现，并附带双属性弱点计算器。
一款接入 Open Trivia DB 的快节奏主题问答——选定类别与难度，然后在每题倒计时中抢答，答对即可连成连胜并不断累加得分。
输入任意文字，一次性在十几种头像风格中锻造出同一个身份——确定性、可分享、可无限重掷。
输入一个名字，三个公共 API 便会猜测你最可能的年龄、性别和国籍——并附上置信度。
一款温暖、富有电影感的浏览器，收录每一部吉卜力工作室电影——海报、剧情简介和烂番茄评分。
看国旗猜国家——快速作答、连成连胜，按地区筛选以提升难度。
以分支树的形式浏览任意宝可梦的整个进化家族——精灵图与每一次进化的确切条件。
一款 xkcd 漫画档案阅读器——把鼠标悬停在图上即可揭示那条著名的隐藏标题文字笑点。
摇一摇随机调出一杯鸡尾酒，或按名称搜索，得到一张清爽的配方卡——照片、酒杯、用量和调制步骤。