TinyWars Developer Talks New Retry Wave Feature

In the case of Tower Defence or any game-play system that relies on surviving multiple waves of enemies, does the option to restart a level at a particular enemy wave or from scratch in the event of a failure make the game more enjoyable?

The developers of TinyWars believe in the former, so much so that they have now inserted a 'Retry Wave' into the Tower Defence venture's upcoming demo.