jrgames+

I played through all the levels and the game was very fun.

A couple little things that I didn't like so much where the fact that you can wall jump while still standing on the ground and when you move in a direction you are instantly going full speed.

Awesome start, hope you make some more levels soon so I can play through em!

Try these changes I've made.

Create Event:

global.black_turn = true
global.white_turn = false

if (global.black_turn) global.white_turn = false;
if (!global.black_turn) global.white_turn = true;
if (global.white_turn) global.black_turn = false;
if (!global.white_turn) global.black_turn = true;

For the zones (Assuming this is not a create event):

if (global.black_turn)
{
instance_create (0,0,black)
global.black_turn = false
global.white_turn = true
}
if (global.white_turn)
{
instance_create (0,0,white)
global.black_turn = true
global.white_turn = false
}

If you put "global." before a variable it becomes global, meaning it is accessible from any object. Also I changed the 1's and 0's to true and false, I assumed you where using them that way. Other than that I just changed some of the syntax you where using, if you have any questions on that just let me know.

Also if your going to compare something you need to use two equals signs, for example:

if(variable == 32)doStuff();

Edit:
As ClassyGoat says, you could use a single variable like so:

Create Event:

global.black_turn = true

For the zones (Assuming this is not a create event):

if (global.black_turn)
{
instance_create (0,0,black)
global.black_turn = false
}
if (!global.black_turn)
{
instance_create (0,0,white)
global.black_turn = true
}

Well, before the room is reset, use:

global.WINDOW_X=window_get_x();
global.WINDOW_Y=window_get_y();

and after that, use:

window_set_position(global.WINDOW_X,global.WINDOW_Y);

Oh yeah, that was stupid of me lol.
Thanks.

Very nice engine, keep workin on it.
You might want to consider getting an artist and making it original.

I waannnnttt a client update >=(  
keep going with this, give people something to play for.