I'm having no problem. When are you pressing the shoot button? Try pressing it before the ball arrives at Messi's feet.
As for impressions, man this game is amazing. I loved last year's demo, but then Konami's first patch made the game play much worse, so I'll wait 'til the final product is released to make a full conclusion.
But man, oh man is this a great representation of soccer. In particular my last match. First, Neymar dove and won a red card, which had me both pissed and impressed at how accurate a portrayal that was. Then 5o minutes in Messi dribbled through my entire team (Napoli) from 20 yards out, jinked into the box, and blasted one far post for a 1-0 Barca lead. At that point they proceeded to tiki-taka pass in their own half and control the ball which was insanely frustrating as I couldn't get the ball. Never before had I seen that kind of possession play in a soccer video game. Back-pass after back-pass, and me helpless to take the ball. But then Alves made a bad pass which was easily intercepted, and the break was on. What's great about the gameplay is that your players make great runs, which is a problem in FIFA and PES games of years past. In PES 2015, however, because players make the right runs, you can see plays developing in advance. In this case, Hamsik took off down the wing and I lofted a through ball ahead of him. He had a step on the defense. While the ball was in the air to Hamsik, I noticed Barca's defenders were running forward in-sync to try and play the offside trap. Higuain was between the two CB's, and I saw him backpedal with the defensive line to stay onside, which is really impressive AI to have that awareness. Knowing I had to act quickly, I had Hamsik one-touch a lofted throughball into the box. Higuain timed his run perfectly, found himself all along with the keeper, and slotted one far post to equalize the score. I fist pumped excitedly, and that excited emotion is one I haven't felt playing an arcade soccer game since the glory days of Winning Eleven/PES. I say arcade soccer game, because nothing will ever match my celebration after winning the CL for the first time in Football Manager on a 119th minute volley. Thankfully nobody was in the room to see that. They would have thought I was a crazy person. Up a man, but now tied, Barca started pressing for a goal. Keepers still parry the ball way too much, and I got lucky twice that Barca didn't score on the rebound. As good as this game is, the keepers are a glaring weakness. I'm playing on superstar difficulty, so I don't think difficulty matters with the keepers. Then in the 90th minute I stole the ball from Neymar who had come to midfield to get it. He tried to dribble through two defenders, and once more the break was on. I played a through-ball to a wide open Hamsik on the right wing, and he played an early cross into the box for a wide open Higuain header goal. Cue more excited fist pumps.
I am loving this demo. But, as I detailed above, the keepers are still poor, and that could be a huge issue if I start giving up cheap goals.