Every level had the perfect IGT (aside from 4-4 where the optimal IGT strat loses RTA), can save maybe 0.5 on 4-1 and 0.5 on 4-4 but 4-2 and 4-3 were perfect.

4-1: 37.70 4-2: 46.60 4-3: 59.34 4-4: 52.66 Total: 3:16.34