Have you aced this first level and unlocked and pirate hook and pirate eye patch?
1. Make sure you have the rainbow color shoe in your inventory. Play the level if you don't have it.
2. About a quarter of the way through, you will encounter a floating cardboard where you can place the rainbow shoe.
3. Place the rainbow colored shoe on the shoe shaped cardboard, and the race gate will lower automatically.
4. Continue with the level until the collapsing bridge, the raibow colored shoe had triggered the flying bird to lower, which now you can use as a swing the clear the bridge.
Now go claim your aced level prize!