what is the "directionOfShoot" object ?

you need to put an angle, if you want to get an angle from coordinates you need two points. the "from" point and the "to" point

then to get the angle the formula is angle(from.x,from.y,to.x,to.y)

Here you're just putting an x and y coordinate separated by a coma, that's not something c2 understands

Apply Physics force 4 at Angle (Arr.angle) at image point 0

toward(arr.X,arr.Y)

you make a physical object cross hundreds of pixels in one tick. I still wonder why it's not even worth than just that.

I would probably save velocity and torque in variable on collision and reapply them after transfert (with maybe some some orientation changes if your portals have differents angles)

Hmmm I'm divided about this idea. It sure is interesting to increase the tut volume and maybe the average quality of them. But the issue here is the judging criteria.

The previous contests about making a game had a simple judging criteria : make a fun game within the limitation of the rules (mainly using C2, a theme, a required feature, etc)

For a tutorial contest, the criteria would be : make an interesting tutorial?

In my opinion, tutorials has two quality components :

• extrinsic: easy to follow (good flow), easy to understand (quality of explanation).
• intrinsic: the subject of the tutorial

We can make tutorials about pretty much anything in C2. But all subject aren't equally interesting.

Then maybe, if you were to launch a tutorial contest, there should be some categories like "c2 concepts" "making a type of game (platformer, rpg, shooter)" "math and programming concepts"

But then you'd have to multiply prizes... etc

Well just an opinion :D

Also up is lower than down on c2 coordinate system.

Y = 200 is higher than Y = 400 ... Just to say

A.count = 0

check my old falling leaves capx.

fallingLeaves.capx

It seems like you have some missing files. js consol tells me that "logo.png" and "offline.appcache" are missing

it's two files that should be generated in the root folder of the game.

button.capx

Explain/show some context. You probably have a game situation where you need to do something like this. It's easier to explain with context.