Phase B: new content — daily challenge, enemies, platform, settings, stats

B1 Seeded RNG + Daily Challenge
- utils/random.js wraps Phaser seedable RND (Between/frac are NOT seedable)
- All gameplay spawning (PlatformManager, Platform, Enemy) uses seeded rng
- GameScene reads mode/seed in init and seeds the run; daily shows a HUD badge
  and keeps a per-day best (daily_<YYYYMMDD>); MenuScene DAILY button;
  GameOver RETRY preserves mode and shows today's best
- Verified: same seed -> identical layout, different seed -> different

B2 New content
- Enemy mev_bot: homing chaser that eases toward the player (unlock >1500)
- Platform reorg: phantom, semi-transparent, vanishes shortly after landing
  (unlock >600); no power-ups on breaking/reorg; SPAWN_RATES + UNLOCK config
- Verified spawn distribution at high difficulty includes all new types

B3 Settings
- SoundManager gains volume (persisted); MenuScene SETTINGS overlay with
  volume stepper, particle-quality Low/High toggle, two-step reset progress

B4 Stats
- StatsManager tracks lifetime games/jumps/stomps/blocks/best combo, flushed
  at game over; MenuScene STATS overlay; hooks in GameScene/ScoreManager

B5 Difficulty tuning via UNLOCK thresholds and rebalanced spawn rates

Functionally verified in-browser via eval (no console errors, deterministic
daily, content spawns, particles emit). Visual screenshot unavailable in the
headless preview because the hidden tab pauses Phaser's loop.

src/config/game.config.js

@@ -13,9 +13,10 @@ export const PLATFORM_GAP_MIN = 60;
 export const PLATFORM_GAP_MAX = 120;
 
 export const SPAWN_RATES = {
-  stable: 0.60,
-  moving: 0.20,
-  breaking: 0.15,
+  stable: 0.55,
+  moving: 0.18,
+  breaking: 0.12,
+  reorg: 0.10,
   genesis: 0.05,
 };
 
@@ -37,6 +38,13 @@ export const DIFFICULTY = {
   maxEnemyRate: 0.30,
 };
 
+// Height (px climbed) at which harder content starts appearing.
+export const UNLOCK = {
+  reorg: 600,
+  failedTx: 800,
+  mevBot: 1500,
+};
+
 export const SCORE = {
   basePoints: 10,
   genesisBonus: 50,