update v0.3

[u]This update includes an important change:[/u] [list] [*]After losing all lives, you'll get revived at the last level instead of the beginning of the tower. However, there will be a revival count which will cause missing an achievement. [/list] [u]Additional changes:[/u] [list] [*]First secret room has been redesigned. Few other levels have minor design improvement. [*]Added a tutorial for the moving platform. [*]Music does not restart at every level, instead continues where it stopped. [*] Added 1 achievement. [/list]