Thanks everybody who have given feedback. I have stop updating this game and started working on a new game. all your feedback given here will be used to make that game the best it can be. thank to everyone who commented.
There is now a prombeem with dropbox. I will try to fix it. but you can play the game with out probleem with this link: http://wiegerkeulen.nl/Games/troll%20shooter/
 "Minion summoner idle"){kind=icon}
 "troll shooter"){kind=icon}
it is fixed