Unusual Logic calculation time in BGE

Hi,
I’m not new to the BGE but I still can’t find why in the latest game I’m working on, the time spent in logic calculation restrain my framerate to nearly 24 fps whereas normally it’s at 40 fps (I put it at 40 fps). I checked many things and since it’s just the very begining of my work logic bricks are pretty simple, and objects are in low-poly… If anyone could tell me where I did wrong it would be great :wink:

Here is the link to my dropbox, the file is “ProjectTD Beta” :

Your url links to your local account. This is only valid for you. Please post the public url to your file.

Sorry for the bad link, I’ll try to create a public link.