If you call Graphics() you do not need to call SetGraphics after it, the display is already open and working.
What you might consider is changing Graphics() to CreateGraphics() and then calling SetGraphics(), unless you want the flip/timing feature of Graphics()
Does your graphics card support the resolution and color depth you are requesting, ie gamewidth x gameheight in 32 bit?
Does your system regularly support full-screen 32-bit when you just do Graphics 640,480,32?
Did you draw to the screen but forget to flip it?
What you might consider is changing Graphics() to CreateGraphics() and then calling SetGraphics(), unless you want the flip/timing feature of Graphics()
Does your graphics card support the resolution and color depth you are requesting, ie gamewidth x gameheight in 32 bit?
Does your system regularly support full-screen 32-bit when you just do Graphics 640,480,32?
Did you draw to the screen but forget to flip it?