Are my levels really that difficult? It takes getting used to the cablecars but once you know how to handle them it's not that bad...
The easiest levels should not be at the beginning but spread equally through the pack so that bad players can still get access to all levels. And that's where I failed, I shouldn't have put Loop3 and Cablecar after each other. Though Cablecar is really easy... Perhaps you should watch my replay?