WebGl Effects strange in itch.io

Hi,

I upload my game to itch.io (not public, just test) and the effects is bahaving strangely, they are not centered, some times they are too zoomed, but in c2 preview they are normal, just fine.

I used some shaders like the MultipleFx 1, 2, 3 and 4 coverted for us by Gigatron, Raster by necromaster, etc.

Do you know what can be causing it?

Thanks in advance (;

—

Just answered by pm.... the resolution of C2 project must be equal to resolution of itch.io eg: 640x480 i have tested it and it's works.