Tetris Worlds

Hint: Indefinite flips:
When a piece reaches the bottom, you can turn it indefinitely, giving you more time to think.
ZMike123456.

Hint: Easy ranks:
In story mode you can only gain one rank per game. Once you go up one rank (usually after reaching the goal within two minutes for a second time) just top out, watch the scenery change, and start again to gain another rank.

Hint: Hulk (Marvel Comics) created character:
Use the following customizations.
Jamie.

Name: Hulk
Color: Green
Extras/Hair: Messy black hair (the first hair style you are able to use, not the pigtails).

Hint: Wolverine (Marvel Comics) created character:
Use the following customizations.
Jamie.

Name: Wolverine(or Logan)
Color: Yellow
Extra/Hair: The hair that you unlock after you rank up to level 2(Looks like two horns).