Combat on the tier ladder, less combat XP, eating costs a swing

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -19,10 +19,11 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
   or crit. Every blow has a damage type (slashing, blunt, piercing, magic);
   each enemy is vulnerable to some (+25%) and resists others (-25%), shown
   as tinted icons. Armour stops physical blows, ward stops magic. Below half
-  health you eat from your bank; out of food you retreat, losing nothing but
-  the fight. HP recovers 25% an hour. The Combat page replays the fight
-  live. Fights are split into the Frontier (bandits, sabotage, drilling, the
-  city's troubles) and expeditions: Greenwood to start, then one area per
+  health you eat from your bank, and each bite holds back your next swing;
+  out of food you retreat, losing nothing but the fight. HP recovers 25%
+  an hour. The Combat page replays the fight live. Fights are split into
+  the Frontier (bandits, sabotage, drilling, the city's troubles) and
+  expeditions: Greenwood to start, then one area per
   tier (Old Watchtower, Sunken Barrows, Iron Hills, Frostpeak, Dragon's
   Spine), each with four races and a boss (the dragons at the top). Every
   kill is one of the race's variants (a brute, a skirmisher, a caster, now
@@ -69,7 +70,8 @@ Alpha. One season, bandit raids plus two friendly events, six buildings.
   helmet, greaves, cuirass and five tools; every leather tier a cap,
   trousers and jerkin; every cloth tier a hood, leggings and robe. Higher
   bars need coal; each metal past copper needs a Smithy level (rune needs
-  level 5, so a city). Gear needs a combat level to wear, tools a skill
+  level 5, so a city). Gear needs the combat level of its tier (15, 30, 45,
+  60, 75) to wear, and the areas open at the same levels; tools need a skill
   level to use.
 - **Classes are trades,** from gathering to finished goods, so each player has
   a quiet gathering side and a busier crafting side: miner (mining, smithing,