Help - App Older mobile devices - issues?

I have a 64 GB iPad 3 fully updated to I OS 9.3, and I have some weird issues. I have been told recently that these issues are due to my older device. (note that not everyone can afford to spend a mortgage payment just to upgrade their mobile device, so this is important for as long as Apple supports these older iPads)

See my post for a description of sluggishness here:

http://mekoramaforum.com/media/water-works-by-brd-bot.337/

Not only do I have problems with sluggishness when there is a lot of motors and movable blocks but I also have situations where I can't move the tube on the rail that I should be able to move.

Here is one example:
http://mekoramaforum.com/media/lostheaven-png.604/#comment-1023

And with this one, I cannot swing the piece on the moving rail:
Http://mekoramaforum.com/media/mind-your-head.669/#comment-1170
Same issue... Previous comment for this level may have been deleted.
http://mekoramaforum.com/media/mind-your-head-passed.680/

So between the sluggishness, and the swinging of movable parts, ball games are utterly impossible for me to do because nothing moves smooth enough to control the bats properly, if at all.

Oh, and I cannot move a ball with a yellow bot. Yellow bots do not push balls, they can't affect the movement of a ball… And I'm being told that again that it is an issue with my older device.

I also seem to have problems scanning cards. Quite a few cards actually. Usually I can get around it by enlarging the QR code. But sometimes I can't.

Currently unable to scan either of the ones called. "Meteor Land"

To be fair a lot of times I have said I can't scan something and somebody else is agreed. But one of the moderators has told me that he thinks it's because of my iPad, that he has had no problems with scans.

Are all of these related to my iPad 3?
Or is it something else? And I'm just stupider than I think I am?

 

Are you able to swing the arm in mind your head?

I am also failing with "monorail escape 2" by retrograde. Odd behaviour that is not working the way he says it does, because I can't move smoothly with an old device.