fixed spaces and stuff getting into the level id

app/bloonsa_api/views.py

@@ -1,3 +1,4 @@
+import string
 import json
 
 from django.contrib.auth.decorators import login_required
@@ -23,6 +24,7 @@ class CSRFexemptTemplateView(TemplateView):
 class LoadLevel(CSRFexemptTemplateView):
     def post(self, request, *args, **kwargs):
         level_id = request.POST.get("level_id")
+        level_id = "".join(x for x in level_id if x in string.digits)
         if level_id is None or not level_id.isdigit():
             return HttpResponseBadRequest()