Algodoo

Nice job on the game! Next, maybe you can make a scoring system for it?

I don't know, Xray. I'm kinda not good with scripts... but I can TRY!

Nice improvements you made!

You can get rid of the score and the lives displaying "undefined" when the scene is first loaded by initializing those variables each time the scene gets loaded. You do that in "onSpawn". An example would be:

onSpawn = (e)=> { scene.my._MRB = 0; scene.my._PAC = 1}

Because those are global (scene.my) variables, you can initialize them in ANY object. Local variables (those variables which begin with an underscore, such as _var) must be initialized within the object where they are stored and used. The underscore character that you use in global variables is not necessary.

Hope this helps.

Score still shows "undefined" when the scene gets loaded.

I noticed that the PacMan character bounces around like a helium balloon, and he never points in the proper direction in which he is travelling. Well, I have a fix for that. PacMan is made up of two polygons, and so you can put the same script in both polygons at the same time like this. Select both polygons, and then open the "script menu". You should see a total of two polygons. In the script menu, add (copy and paste) the following script to "postStep":

keys.isDown("up") ? {
angle = {1.65}
} : {};
keys.isDown("down") ? {
angle = {-1.4}
} : {};
keys.isDown("left") ? {
angle = {3.3}
} : {};
keys.isDown("right") ? {
angle = {0.0}
} : {}

What that does is it makes pacMan face in the correct direction when any one of the four arrow keys is pressed.

EDIT: By the way, those numbers for the angular directions are not what they should be, and that is because of the fact that the pacMan texture does not "fit" correctly on the polygons. If it did fit correctly then the numbers would be multiples of pi (such as pi/2 and 2pi). So instead of pi/2 (which is 1.57) I had to use 1.65. And for pi (3.14) I had to use 3.3. That's why I had to use those oddball numbers.

I could also show you how to make PacMan open and close his mouth as he moves, but that requires a lot more complexity, and I don't think that you will want to spend a lot of time and effort to do that right now. So, maybe some time later....

I see that you got rid of one of the pacMan polygons. GOOD! Now you need only one to worry about! The instructions to make him point in the correct directions are exactly the same as before except you only need to add the script to ONE polygon instead of two.