This level is not so simple. I've died between 46% and 49% 7 times and finished the level at one shot from 49%.
Coins
0:24 Jump over the block and graze the sawblade. Get the key and tap the green ring a little bit late.
0:30 1st coin
0:40 Tap twice fast to get the key.
0:45 2nd coin
1:02 Skip the black ring and the cyan pad and get the key.
1:04 3rd coin
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