This should work:

Touch is touching column

column set visible

else

column set invisible

Without families using pick nth instance should work also:

System -> Pick nth Instance

If 2 instances collide, picking instance 0 will pick the first instance and instance 1 will pick the 2nd instance

ON collision Enemy with Enemy

Pick instance 0 ... do whatever

Pick instance 1 .. do whatever

From the tutorial section:

https://www.scirra.com/tutorials/797/ho ... -colliding

Well if your collision-polygons and origins are in the right position you could always check if using the crop function in the image editor would reduce framesize..

That's why I created my example.

All you need is in my capx right?

Just copy or recreate the events and sprites and it should work..

Are you using pixel rounding?

Are the original positions of the backgrounds at exact pixel-positions?

Are there no (semi)transparent pixels at the edges of the backgrounds?

I haven't had this issue before, so these are the first things I would check..

One way would be to reduce the number of frames in the animations

Another way would be to reduce the amount of animations

Another way would be to reduce the size of the animation-frames (by cropping them?)

Question is, what options are you prepared to look at?

Like I said..

You'd want to set the angle of the sprite to thumbstickstick.a degrees

so:

on touch

thumbstickstick is selected

sprite set angle - thumbstickstick.a

Although I don't know how intensively you'd want to use the feature it would be possible to create it with blendmodes (for the masking part) , and copies of the sprites for the inversion part..

With a bit of creative coding you could probably keep processing-power relatively low..

Wouldn't it be easier to use the timer behaviour instead of the wait action?

scenes = 0

-- every tick

simulate pressing right

-- trigger once

start timer with tag "scenes0a" for 15 seconds

on timer "scene0a"

set maximum speed to 40

start timer "scenes0b" for 3.5 seconds

on timer "scene0b"

-- set maximum speed to 30

-- start timer "scenes0c" for 1.5 seconds

on timer "scene0c"

set maximum speed to 40

start timer "scenes1a" for 0.5 seconds

on timer "scene1a"

set scenes to 1

sprite set mirrored

etcetera..

It would consist of setting the angle of the player to thumbstick.a degrees

Very simply put:

"Create Object" at random(100,layoutwidth-100), random(100,layoutHeight-100)

So just add the pixels offset from the border you would need (in this case 100)

Unless you want to be even more specific about the "randomness"