a title screen is a title screen, you know? sure, it's the first thing that your audience will see when they play your indie game, so obviously we need it to captivate them. you need to put enough effort into your title screen to speak to the players and intrigue them for what's to come, but at the same time we need to be careful not to reveal too much of our game with it. in this case, by using screenshots of the gameplay you are directly showing the players what's to come. that may intrigue some people, but others may see it as laziness (oh, he couldn't come up with anything better, so he just used a few screenshots. how good can this game be if this is the kind of effort to be expected throughout?). it's obviously a very important piece of your game, but it's just a title screen at the same time. in my honest opinion, a title screen doesn't need to be anything more than a single static image. it does the job when presented properly.