Well you really can't but I wish you could. The only thing you can do is find it on a different website and play it there. There are a lot of places that have it.
www.ninjakiwi.com
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you can play bloons tower defense on ninjakiwi
Bloons TowBloons Tower Defense 3er Defense 3 money
no
The bloons tower defense 4 track editor will be released around mid-November
http://fliiby.com/get/298422/Bloons-Tower-Defense-3---Distribute-jhttd4p66g.html wait 30 seconds and download =)