I've been doing tactics and it is confusing that there is a 'arrow pointing right' and 'next tactic'. After I fail it should automatically restart. If I fail

I've been doing tactics and it is confusing that there is a 'arrow pointing right' and 'next tactic'. After I fail it should automatically restart. If I fail after one move, it should say "Get checkmate in one move", otherwise I don't understand why I failed. It should be win the game from this point, not move into these specific places. Unless you have already determined it is detrimental to progression to continue playing out the scenario.