Implement native opening scenes, battle foundation and overworld movement

README.md

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 A native web port of Pokémon Crystal, translated from [PRET's Game Boy disassembly](https://github.com/pret/pokecrystal). The game runs in TypeScript and reads graphics, maps, sprites and dialogue from the user's own ROM. No original game assets are included.
 
-**Current milestone: New Bark Town exploration.** Walk around your room, downstairs, town and its buildings. Read signs, use the bedroom radio, try supported conversations, and save your progress. Opening scenes, story progression, battles, NPC movement, decorations, audio and the rest of the world are still being ported.
+**Current milestone: the opening through Elm's starter.** Play in a minimal Crystal-style interface with Game, Savegames, Map, Pokédex, Link and Friends tabs. The native canvas fills the play area, and the live local map follows your position. Save, export and import work now. Pokédex, Link and Friends show their planned scope without placeholder data.
+
+Walk around your home, the town and its buildings at the original walking speed. Mom gives you the Pokégear and asks the day of the week. The teacher stops you from leaving town. Your rival shoves you away from the lab window. Professor Elm introduces his errand, and you choose Chikorita, Cyndaquil or Totodile. The Pokémon's picture and stats come from your ROM, and you can nickname it. Elm's aide then gives you a Potion. These scenes run the game's own event scripts and movement data, with native choices and naming.
+
+Battles, routes beyond New Bark Town, party and bag menus, random NPC movement, decorations and audio are still being ported. Neighboring routes appear at the town's edges but cannot be entered yet.
 
 ## Run
 
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 Open the printed local URL, choose a name/character and select your uncompressed **English US/Europe revision 1.1** ROM (`.gbc`, 2 MiB). Its checksum is verified locally. ROMs are never uploaded or stored in browser storage; select yours again after reloading to resume.
 
-Use onscreen controls, or focus the game screen and use arrows to move, **X** to interact and **X / Z** to continue dialogue. Sessions save every 10 seconds and when paused. Switching apps pauses play. Download a backup before clearing browser data.
+Use onscreen controls, or focus the game screen and use arrows to move, **X** to interact and **X / Z** to continue dialogue. In choices, **Up / Down** change the answer, **X** confirms and **Z** answers No. Sessions save every 10 seconds and when paused. Switching apps pauses play. Download a backup before clearing browser data.
 
-Native saves are separate from emulator snapshots and cartridge `.sav` files. Time-of-day colors follow the device clock. The tile counter measures in-game movement, not real-world steps.
+Native saves are separate from emulator snapshots and cartridge `.sav` files. Saving during a scene keeps the progress from before it, so the scene replays after loading. Time of day follows the device clock; the weekday you give Mom is kept as an offset from the device's weekday. The tile counter measures in-game movement, not real-world steps.
 
 ## Reference emulator
 
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 Local-ROM tests use `Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc` at the root, or `CRYSTAL_ROM_PATH`. They skip when absent; no test downloads a ROM. Game files, private reference builds and gameplay screenshots must remain ignored.
 
-The [full port plan](docs/PLAN.md) covers remaining game systems, mobile UI, internet Link and walking. See the [architecture](docs/ARCHITECTURE.md) and [routine map and verification](docs/NATIVE_PORT.md) for module boundaries and reference checks.
+The [full port plan](docs/PLAN.md) covers remaining game systems, save slots, the world map, Pokédex, internet Link, friends and optional mobile step support for egg hatching. See the [architecture](docs/ARCHITECTURE.md) and [routine map and verification](docs/NATIVE_PORT.md) for module boundaries and reference checks.
 
 References: PRET [documentation](https://pret.github.io/pokecrystal/), [wiki](https://github.com/pret/pokecrystal/wiki) and [source](https://github.com/pret/pokecrystal). The development reference uses [binjgb](https://github.com/binji/binjgb) under its [MIT license](reference/public/vendor/binjgb/LICENSE); see [provenance](reference/public/vendor/binjgb/PROVENANCE.md).