Added Glitch Room Source code to Gitty

games/space_invaders/overlay.gdshader

@@ -0,0 +1,13 @@
+shader_type canvas_item;
+render_mode unshaded;
+uniform bool overlay = true;
+void fragment() {
+	vec4 pixel = texture(TEXTURE,UV) * COLOR;
+	vec2 p = UV * vec2(224.0,256.0);
+	vec3 tint = vec3(1.0);
+	if (overlay) {
+		if (p.y>=32.0 && p.y<64.0) tint=vec3(1.0,0.05,0.03);
+		if ((p.y>=184.0 && p.y<240.0) || (p.y>=240.0 && p.x>=24.0 && p.x<136.0)) tint=vec3(0.1,1.0,0.05);
+	}
+	COLOR=vec4(pixel.rgb*tint,pixel.a);
+}