Okay, I tried it out and... well, thanks, it does work better on some walls. However, it's still not entirely bug-proof... it's supposed to bounce at the correct angle and mainly slide along walls. Anyone know how this code could be improved?

Code:

---

function ball_event
{
	my_motion.x = -my_motion.x;
	my_motion.y = -my_motion.y;
	
	my_motion.x *= 0.5;
	my_motion.y *= 0.5;
	vec_to_angle(temp, bounce); 
	if(temp.pan > -1) && (temp.pan < 181)
	{
		my_motion.x += cos(temp.pan)*(vec_length(my_motion));
		my_motion.y -= sin(temp.pan)*(vec_length(my_motion));
	}
	else
	{
		my_motion.x -= cos(temp.pan)*(vec_length(my_motion));
		my_motion.y += sin(temp.pan)*(vec_length(my_motion));	
	}
}

action ball
{
	ball_object = my;
	my.event = ball_event;
	my.enable_block = on;
	my.enable_entity = on;
	var space_on;
	while(1)
	{
		proc_late();
		ball_pan1.pos_x = int(my.x) - 32;
		ball_pan1.pos_y = table_panel.pos_y + (2048 - int(my.y)) - 32;
		my_motion.z = 0;
		my_motion.y -= 0.25 * time;
		if(key_space) && (space_on == off)
		{
			space_on = on;
			my_motion.x -= 15 * time;
		}
		if(!key_space)
		{
			space_on = off;
		}
		c_move(my, nullvector, my_motion, ignore_passents+activate_trigger+use_aabb);
		if(my.x < 0){my.x = 0;}
		if(my.x > 1024){my.x = 1024;}
		if(my.y < 0){my.y = 0;}
		if(my.y > 2048){my.y = 2048;}
		my_motion.x += key_cur*0.5*time;
		my_motion.x -= key_cul*0.5*time;
		my_motion.y += key_cuu*0.5*time;
		my_motion.y -= key_cud*0.5*time;
		wait(1);
	}
}

---