WOW, what a wonderful PAAAAANNNNNNNNK Picture! I just say that how you put all the vectors together to make a picture scene, it's really clever.
First I will start by saying how arranged Pinkie Pie in all different places to arrange the scene behind the vectors which is Twilight's Library House and that is a great scene start with and using other ponies in the picture to bring it all in!
Putting different stories in it like Pinkie blowing a trumpet causing Flitter and Cloudchaser to wonder and Applejack, Rarity, Fluttershy and Twilight to wonder what's going on is a great way to affect the scene behind it all.
I can't really make out what Pinkie is saying at the top but everything is fine and ha, ha hilariously funny and I look forward to seeing your future piece of arts!