I NEED HELP!!

Hi,

my game is : https://flowlab.io/game/view/43512

SpaceBar to build,

hi, how can I make the players block limited? and how can I make the players block will not disappear

Screen Shot 2014-03-17 at 6.15.40 AM

Screen Shot 2014-03-17 at 6.15.46 AM

Screen Shot 2014-03-17 at 6.16.38 AM

Screen Shot 2014-03-17 at 6.17.21 AM
Screen Shot 2014-03-17 at 6.17.30 AM

Screen Shot 2014-03-17 at 6.18.31 AM

Last step:

Screen Shot 2014-03-17 at 6.19.24 AM

well…in the alert… I Connect the click of alert to restart…but when restart…when retrying to place again… the alert will keep appearing…

oh…sorry…I Forgot the last step… xD

edit : it wont place blocks now…