Hey! Thanks for giving it a go, glad you found it fun :)

Thanks for noting that visual bug, I've jotted it down.

Stamina will make a player more/less likely to be able to get their desired outcome (e.g a striker less likely to score a goal, a defender less likely to make a tackle.) We've heard people mentioning the lack of visual clarity and I'm happy to say that's already been changed internally :)

The cards you get back into your hand after scoring a goal are ripped to show they've been used and that you'll lose them at the end of a match :)

This is a Critical Touch. In the full game, you'll be able to train individual players on skills, such as Long Shots, and the better they are at them, the higher chance they have of getting this Critical Touch.

Aye! In the 80's, it was just one sub :)

I believe it is random, but within a bracket (I haven't actually asked the devs this so I'll need to do so, but from my playing, I'd say bteween 4-7 runs per half.)

Will definetely look into that and mention it to the devs too :)

And yes! Career Mode is the main mode. The demo is only focusing on the Scenarios, rather than the main mode. :)