Code doesn't seem to work for jump

[fireside]

I haven't downloaded the source, but when I try the jump code, it doesn't work.

I ended up doing this to get it to work:
if (Ax.keys.pressed(AxKey.SPACE)&& this.wasTouching(DOWN)) {
velocity.y = -360;
y -= 1;
}

I had to use wasTouching because isTouching returned false, and I had to raise the y one pixel or it wouldn't budge.

[Arkeus]

Usually having to use wasTouching and collision problems are caused by doing things in a different than normal order.

You should typically do all your game logic BEFORE super.update() in anything where you override update. Then you should include all .collide or .overlap calls AFTER the super.update(). Super.update() is where the engine handles all the core logic, so things like "isTouching" flags get swapped over, and become "wasTouching".