Hold down the left or right arrow key in order to do multiple flips in one go and get more time back. You aren't going to be able to flip on every jump, but when you do get enough air, make sure to get your flips in to help your time.
Level
First place
Second place
Level 1
0m 19s 210ms CoKoNut
0m 19s 440ms Kaotiic
Level 2
0m 33s 140ms Nat_Cat
0m 34s 070ms CoKoNut
Level 3
0m 27s 970ms Kaotiic
0m 28s 370ms Catmint CoKoNut
Level 4
0m 24s 040ms CoKoNut
0m 24s 510ms twinklymeat