Reversi

Reversi is part of Frank Force's LittleJS Arcade collection — a set of classic games built on his own open-source LittleJS engine — and it's a good example of what happens when a well-worn genre gets real attention paid to the one interaction a phone actually supports well: a single, precise tap.

Tap-to-place is the right answer for a board game on a phone

Every legal move on the current turn is marked with a small grey dot directly on the board, and placing a disc is a single tap on one of those dots. That was tested directly rather than assumed: tapping a highlighted cell on a simulated 390x844 touch viewport placed a black disc and correctly flipped the intervening white disc to match — confirmed twice, the second time watching the score counters update from 2-2 to 4-1 exactly as the capture rule requires. The AI then took its turn, visibly indicated with an "AI Thinking... 71%" progress readout rather than a silent pause, placed its own disc with a yellow highlight ring marking the just-played move, and correctly returned control with an updated "Your Turn" prompt and a freshly recalculated set of legal-move dots. There is no drag gesture, no timing window, and no multi-touch requirement anywhere in this interaction — exactly the kind of low-risk touch mechanic this shelf rewards.

The same mechanic carries over cleanly to desktop. A precise mouse click on a legal-move dot produced an identical capture, and the game layers real keyboard shortcuts on top: pressing U after placing a disc undid the move and reverted the board exactly to its prior state, with the on-screen "U: Undo (1)" counter confirming the action registered rather than silently failing. R (restart) and ESC (pause) are advertised in the same footer and were not independently exercised beyond confirming ESC opens a proper pause menu with Resume, Restart, Options and Quit to Title options, all rendered correctly.

Standard rules, well-built shell

There is nothing new about the actual game here — it's Othello, eight-by-eight board, standard flip-capture rules, the same game that's existed since 1971. What Reversi brings is a genuinely solid shell around it: three ways to play (against an AI with a selectable difficulty, against a second local player, or watching two AIs play each other), a mute toggle that was confirmed to actually change the speaker icon when tapped, and an options/help menu structure that suggests the whole LittleJS Arcade template this is built from was designed with more than one game in mind. The install itself pulls in that shared scaffolding — the LittleJS engine plus a handful of shared menu, AI and effects scripts from the parent repository — rather than shipping as a single self-contained file, which is worth a note for anyone maintaining this listing later, but has no bearing on what a player experiences.

Verdict

Reversi isn't trying to reinvent anything, and it doesn't need to: this shelf's bar is "can you actually play this comfortably on a phone," and tap-to-place clears that bar about as cleanly as a control scheme can. Between the confirmed touch behavior, the equally solid desktop mouse-and- keyboard path, a real AI opponent, and a level of interface polish (undo, pause menu, mute toggle) that a lot of "arcade collection" games skip, this earns its place.