Tarpit sample isn't right.

tarpit_sample.json

@@ -1,13 +1,5 @@
 {
-  "audio": {
-    "you_died": "./assets/you_died.mp3",
-    "build_works": "./assets/build_works.mp3",
-    "build_failed": "./assets/build_failed.mp3",
-    "building": "./assets/building.mp3"
-  },
-  "images": {
-    "build_words": "./assets/build_success.png"
-  },
   "git_path": ".\\",
-  "build_cmd": "meson compile -C builddir"
+  "build_cmd": "meson compile -C builddir",
+  "test_cmd": "./builddir/runtests.exe"
 }