The posterized sky is a very cool touch. With all the empty space in the northeast quadrant, I don't see the need for the text to encroach on the cross atop the church. Making "Malta" bigger or a different font might be more 'postcardier.'

Text should be larger and white against a dark background. Not a very exciting font anyway.

very cute Idea.. I think the two people in the front of the piece is enough, but I do like that fact that you decided to play with the shadow and light sources.. good luck on this...it will make a GREAT teaching piece.. good hard work here

nice idea

good work. nicely placed the people.

Thw two people in front match the light source very well. The guys on the left don't work as well. They are in partial shade, but a little of that direct light would filter through to them. Additionally, their light source comes from the right & they should be closer to the size of the two people in the front. I'm not sure about the ones to the right. I don't want to sound negative here because you did a GREAT job on the two in the foreground, as they fit, IMO, perfectly.
Edit: The light on the guys looks better.

Thanks for the comments and suggestions everyone, I have worked on the shadows on the guys on the left, hope the looks better, cheers.

nice image but the shadow under the trophy is a little funky

Not sure all people are the same size, still great job!

Nice idea. Love the couple directly in front! The disinterest of the small kids works too. Perfect!

you did very well