Minor fixes

- Stages:

* Added some destroyable to help to maintain the combo counter

- Combo counter:

* Added a half second to disappear

* Stage transitions have a bonus time to not break the combo counter"

- Added Custom Survival Mode:

* Players can tweak his/her survival experience with a variety of options.

- Mania +:

* Added Cursed arcades in Mania+ difficulty.

* Added special reinforcements during boss battles.

* Added One life.

* The score to get an extra life is higher in the arcade mode.

- Added coop attack:

* Hold ‘Pick up’ and grab your partner to throw him.

* Airborne player can press a special button to perform a unique attack.

- Balancing