How do I beat the A + rated levels? (Hotline Miami)

Complete the levels in one combo, the easiest way to do this is with a frog mask, I don’t remember the name, which increases the time for the combo.

Here https://www.youtube.com/playlist?list=PLPMKRuazV-Ibjoq22GM_ifUJgOYe0GRR_&feature=c4-feed-u