Delay in everything in GMS

Check in your videocard driver settings something called:

"Max Pre-rendered Frames"

It should have a value of 1~3, depending on the speed of your video card / CPU. 1= Fast PC's, 2= Medium PC's, 3= Slow PC's

Rendering more frames ahead will make the game more "smooth" but creates "lag", because you're seeing images from the past.

Any value more then 3 will create more input lag, because the videocard will render more then 3 frames ahead before it allows you to change the input!

Also, make sure you have:
- V-Sync ENABLED (if you use a flatscreen monitor)
- Tripple Buffering DISABLED (after Big Bang this isn't needed anymore for maple)