bug fixes

src/main.js

@@ -106,6 +106,12 @@ const root = {
                 this.nodeId = this.map.nodes.find(n => n.kind === "start").id;
                 this.completedNodes = [];
                 this.log(`🎉 Act ${this.currentAct === "act2" ? "II" : "I"} Complete! Advancing to the next challenge...`);
+                
+                // Save Act 2 checkpoint when first reaching it
+                if (nextAct === "act2") {
+                    this.saveAct2Checkpoint();
+                }
+                
                 this.save();
                 await renderMap(this);
             } else {
@@ -163,6 +169,66 @@ const root = {
         }
     },
 
+    saveAct2Checkpoint() {
+        try {
+            const checkpointData = {
+                player: {
+                    ...this.player,
+                    hp: this.player.maxHp, // Start Act 2 with full HP
+                    energy: this.player.maxEnergy,
+                    block: 0,
+                    weak: 0,
+                    vuln: 0,
+                    hand: [],
+                    draw: [],
+                    discard: []
+                },
+                currentAct: "act2",
+                relicStates: this.relicStates,
+                timestamp: Date.now()
+            };
+            localStorage.setItem('birthday-spire-act2-checkpoint', JSON.stringify(checkpointData));
+            this.log("🎯 Act 2 checkpoint saved!");
+        } catch (e) {
+            console.warn('Failed to save Act 2 checkpoint:', e);
+        }
+    },
+
+    loadAct2Checkpoint() {
+        try {
+            const checkpointData = localStorage.getItem('birthday-spire-act2-checkpoint');
+            if (checkpointData) {
+                const data = JSON.parse(checkpointData);
+                
+                // Restore checkpoint state
+                this.logs = [];
+                this.player = data.player;
+                this.currentAct = "act2";
+                this.map = MAPS.act2;
+                this.nodeId = "n1"; // Start of Act 2
+                this.completedNodes = [];
+                this.relicStates = data.relicStates || [];
+                this._battleInProgress = false;
+                
+                this.log("🎯 Restarting from Act 2 checkpoint...");
+                return true;
+            }
+            return false;
+        } catch (e) {
+            console.warn('Failed to load Act 2 checkpoint:', e);
+            return false;
+        }
+    },
+
+    hasAct2Checkpoint() {
+        try {
+            const checkpointData = localStorage.getItem('birthday-spire-act2-checkpoint');
+            return !!checkpointData;
+        } catch (e) {
+            return false;
+        }
+    },
+
     load() {
         try {
             const saveData = localStorage.getItem('birthday-spire-save');
@@ -252,11 +318,13 @@ const root = {
 
     clearSave() {
         localStorage.removeItem('birthday-spire-save');
+        localStorage.removeItem('birthday-spire-act2-checkpoint'); // Also clear Act 2 checkpoint
     },
 
     // Clear any old saves with outdated card IDs
     clearOldSaves() {
         localStorage.removeItem('birthday-spire-save');
+        localStorage.removeItem('birthday-spire-act2-checkpoint');
     }
 };
 

src/ui/render.js

@@ -1704,10 +1704,21 @@ Better luck on the next run!</p>
         </div>
 
         <div class="defeat-actions">
+          ${root.currentAct === "act2" && root.hasAct2Checkpoint() ? `
+            <button class="defeat-btn primary-btn" data-restart-act2>
+              <span class="btn-icon">🎯</span>
+              <span>Restart Act 2</span>
+            </button>
+            <button class="defeat-btn secondary-btn" data-replay>
+              <span class="btn-icon">🔄</span>
+              <span>Restart from Beginning</span>
+            </button>
+          ` : `
             <button class="defeat-btn primary-btn" data-replay>
               <span class="btn-icon">🔄</span>
               <span>Try Again</span>
             </button>
+          `}
           <button class="defeat-btn secondary-btn" data-menu>
             <span class="btn-icon">🏠</span>
             <span>Main Menu</span>
@@ -1718,12 +1729,31 @@ Better luck on the next run!</p>
     `;
 
 
-    root.app.querySelector("[data-replay]").addEventListener("click", () => {
+    // Add event listeners for restart options
+    const restartAct2Btn = root.app.querySelector("[data-restart-act2]");
+    if (restartAct2Btn) {
+        restartAct2Btn.addEventListener("click", async () => {
+            if (root.loadAct2Checkpoint()) {
+                await renderMap(root);
+            } else {
+                // Fallback to full reset if checkpoint fails
                 root.reset();
+            }
         });
+    }
+
+    const replayBtn = root.app.querySelector("[data-replay]");
+    if (replayBtn) {
+        replayBtn.addEventListener("click", () => {
+            root.reset();
+        });
+    }
 
-    root.app.querySelector("[data-menu]").addEventListener("click", () => {
+    const menuBtn = root.app.querySelector("[data-menu]");
+    if (menuBtn) {
+        menuBtn.addEventListener("click", () => {
             root.reset();
         });
     }
+}