In "It's Awesome Baby" Scott doesn't have blood, but in "Speed Dating" Scott has yellow blood, but in "Borderline Forever" when he falls from space he spits out red blood. This is probably an intentional inconsistency, since in "Speed Dating" Scott states that the reason for his blood's yellow color is because "[He's] color-blind." So, as a joke, his color-blindness probably causes his blood to change color often.
At 26:14, the green screen can be seen reflecting off of the Sega Master System.