Merge pull request #4 from ChrisBoesch/master

update
Merge pull request #5 from ChrisBoesch/master

update
Merge pull request #6 from ChrisBoesch/master

update
level not played are locked now

Levels which are not played need to be locked

Levels which are not played need to

Levels which are not played need to be locked

Levels which are not played need to be locked

Levels which are not played need to be locked
Merge pull request #8 from ruijunhuang2010/master

update