Extra life:
Defeat the Boss at the end of each level to reveal a scroll. Wait until the first and last digits of the timer are the same, then shoot the scroll.

Bonus areas:
Swing your character's sword in the following rooms to reveal scrolls. Hit the scrolls with the sword to collect coings.

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.