Initially lock Mini Black Hole item

src/system/unlockables.ts

@@ -0,0 +1,10 @@
+export enum Unlockables {
+  MINI_BLACK_HOLE
+}
+
+export function getUnlockableName(unlockable: Unlockables) {
+  switch (unlockable) {
+    case Unlockables.MINI_BLACK_HOLE:
+      return 'MINI BLACK HOLE';
+  }
+}