diff --git a/mise.toml b/mise.toml
new file mode 100644
index 0000000..6a0493c
--- /dev/null
+++ b/mise.toml
@@ -0,0 +1,2 @@
+[tools]
+node = "22"
diff --git a/packages/web/package.json b/packages/web/package.json
index a9cd410..6c57ba9 100644
--- a/packages/web/package.json
+++ b/packages/web/package.json
@@ -11,6 +11,7 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "@scorelang/lang": "*",
     "react": "^19.1.0",
     "react-dom": "^19.1.0"
   },
diff --git a/packages/web/src/App.css b/packages/web/src/App.css
index b9d355d..757189b 100644
--- a/packages/web/src/App.css
+++ b/packages/web/src/App.css
@@ -1,8 +1,18 @@
 #root {
-  max-width: 1280px;
-  margin: 0 auto;
-  padding: 2rem;
-  text-align: center;
+  max-width: 100%;
+  margin: 0;
+  padding: 0;
+  text-align: left;
+  width: 100%;
+  height: 100vh;
+}
+
+body, html {
+  margin: 0;
+  padding: 0;
+  height: 100%;
+  width: 100%;
+  overflow: hidden;
 }
 
 .logo {
diff --git a/packages/web/src/App.tsx b/packages/web/src/App.tsx
index adedc70..88f724a 100644
--- a/packages/web/src/App.tsx
+++ b/packages/web/src/App.tsx
@@ -1,11 +1,129 @@
+import { useState } from "react";
 import "./App.css";
+import Lexer from "@scorelang/lang/src/lexer";
+import { Parser } from "@scorelang/lang/src/parser";
+import { Evaluator } from "@scorelang/lang/src/evaluator";
+import { calculatePointsTable } from "@scorelang/lang/src/utils";
+
+const DEFAULT_INPUT = `TeamA 2-0 TeamB;
+TeamA 3-0 TeamC;
+TeamB 0-1 TeamC;
+TeamA 0-0 TeamB;
+TeamA 1-5 TeamC;
+TeamB 0-1 TeamC;
+TeamA 2-2 TeamB;
+TeamA 4-0 TeamC;
+TeamB 1-0 TeamC;
+TeamA 0-2 TeamB;
+TeamA 1-0 TeamC;
+TeamB 0-1 TeamC;
+TeamA 1-4 TeamB;
+TeamA 1-3 TeamC;
+TeamB 3-1 TeamC;
+TeamA 0-3 TeamB;
+TeamA 0-2 TeamC;
+TeamB 1-1 TeamC;`;
 
 function App() {
+  const [input, setInput] = useState(DEFAULT_INPUT);
+  const [results, setResults] = useState<{team: string; wins: number; losses: number; draws: number; points: number}[]>([]);
+  const [error, setError] = useState<string | null>(null);
+
+  const processInput = () => {
+    try {
+      setError(null);
+      const lexer = new Lexer(input);
+      const parser = new Parser(lexer);
+      const program = parser.parse();
+      const evaluator = new Evaluator();
+      const { results } = evaluator.evaluate(program);
+
+      const pointsTable = calculatePointsTable(results);
+      
+      // Convert Map to array for rendering
+      const tableData = [...pointsTable.entries()]
+        .sort((a, b) => b[1].points - a[1].points)
+        .map(([team, stats]) => ({
+          team,
+          wins: stats.wins,
+          losses: stats.losses,
+          draws: stats.draws,
+          points: stats.points
+        }));
+      
+      setResults(tableData);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : String(err));
+      setResults([]);
+    }
+  };
+
   return (
-    <>
-      <div>Hello</div>
-    </>
+    <div style={{ display: "flex", height: "100vh" }}>
+      <div style={{ width: "50%", padding: "20px" }}>
+        <h2>ScoreLang Input</h2>
+        <textarea 
+          value={input}
+          onChange={(e) => setInput(e.target.value)}
+          style={{ width: "100%", height: "80%", fontFamily: "monospace" }}
+        />
+        <button 
+          onClick={processInput}
+          style={{ marginTop: "10px", padding: "8px 16px" }}
+        >
+          Process
+        </button>
+      </div>
+      
+      <div style={{ width: "50%", padding: "20px" }}>
+        <h2>Results</h2>
+        {error ? (
+          <div style={{ color: "red", marginBottom: "20px" }}>
+            <h3>Error</h3>
+            <pre style={{ whiteSpace: "pre-wrap" }}>{error}</pre>
+          </div>
+        ) : results.length > 0 ? (
+          <table style={{ width: "100%", borderCollapse: "collapse" }}>
+            <thead>
+              <tr>
+                <th style={tableHeaderStyle}>Team</th>
+                <th style={tableHeaderStyle}>Wins</th>
+                <th style={tableHeaderStyle}>Losses</th>
+                <th style={tableHeaderStyle}>Draws</th>
+                <th style={tableHeaderStyle}>Points</th>
+              </tr>
+            </thead>
+            <tbody>
+              {results.map((result) => (
+                <tr key={result.team}>
+                  <td style={tableCellStyle}>{result.team}</td>
+                  <td style={tableCellStyle}>{result.wins}</td>
+                  <td style={tableCellStyle}>{result.losses}</td>
+                  <td style={tableCellStyle}>{result.draws}</td>
+                  <td style={tableCellStyle}>{result.points}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        ) : (
+          <p>Click "Process" to see results</p>
+        )}
+      </div>
+    </div>
   );
 }
 
+const tableHeaderStyle = {
+  border: "1px solid #ddd",
+  padding: "8px",
+  textAlign: "left" as const,
+  backgroundColor: "#f2f2f2"
+};
+
+const tableCellStyle = {
+  border: "1px solid #ddd",
+  padding: "8px",
+  textAlign: "left" as const
+};
+
 export default App;