diff --git a/src/app/game/game.service.ts b/src/app/game/game.service.ts
index 7f11399..801028c 100644
--- a/src/app/game/game.service.ts
+++ b/src/app/game/game.service.ts
@@ -2,6 +2,7 @@ import { Injectable } from '@angular/core';
 import { Http, Response, URLSearchParams } from '@angular/http';
 
 import { Observable } from 'rxjs/Observable';
+import 'rxjs/add/observable/of';
 import 'rxjs/add/operator/catch';
 import 'rxjs/add/operator/map';
 
diff --git a/src/assets/.gitkeep b/src/assets/.gitkeep
new file mode 100644
index 0000000..e69de29