New in final version:
* Added a few objects.
* Fixed minor bugs of textures.
New in prefinal2 version:
* Added a few objects.
* Removed a lot of invisible barriers.
* Fixed minor bugs of textures.
New in fix9 version:
* Optimized map (r_speeds).
* Added a few objects.
New in fix8 version:
* Optimized map (r_speeds).
New in fix7 version:
* Fixed many bugs and defects.
* Improve the dynamics of the game.
* Altered several obstacles.
* Added some new buttons.
* Added "secret room".
* Added Teleports.
* Added exploding pipe.
