Porblem with moving tool

[Traxy]

hi! i just started with Gimp and never been using programs like this before
so am realy new to this...

but my project took a suden stop when i could not move my layers eny more? 
i always get this marker up every time now even if i start a new file..
witch is enoying now 

http://kuuv.io/i/c1LBzvl.png

What do i have to do to get this gone....