diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..eaea4da
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,11 @@
+name: CI
+on: [push]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with: { python-version: "3.12" }
+      - name: Syntax check
+        run: python3 -m py_compile 1game.py && echo "OK"