Don't understand why people ask for infinite mode, at two last level you can raise all buildings to level 3 and have nothing more to do. Just keep watching people walking in the street.
Good game, but too easy. Only "Frozen Peak" was really difficult. I've done all map on hard mode. A bug : so I get 15/15 on "Win all maps in easy mode" Award but It isn't check.
Some awards seems too long to get : I killed only 600 ennemies with the Monk out of 2500.
To get the stars of the last level, copy the save file to the Armor game cache, win last level on armor game, here you get the stars, and copyback save file on kongregate cache.
save files are on :
\Users\\AppData\Roaming\Macromedia\Flash Player\#SharedObjects\LART7LEQ\chat.kongregate.com\gamez\0013\3293\live\KingdomRush_v1.071_s_sl_Kongregate_nopremium.swf
and on
\Users\\AppData\Roaming\Macromedia\Flash Player\#SharedObjects\LART7LEQ\cache.armorgames.com\files\games\kingdom-rush-12141.swf
 "Shopping Street"){kind=icon}
 "Corporation Inc."){kind=icon}
 "The Keeper Of 4 Elements"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Cargo Bridge: Armor Games Edition"){kind=icon}
 "Candy Conveyor"){kind=icon}