Level 1-7
Jump and swing the sword just after the group of three birds
passes by.
Level 2
Climb up the fourth tree to find the secret room.
Level 3
Fall off the first cliff to the lower cloud, then swing the
sword and press Up. A teleporter location can also be found
by jumping on the third rising and falling cloud. Eliminate the
kite and bird, then press Up while jumping.
Level 4
Move left and crouch at the second and third blocks from the
left. Hold Down to teleport away.