You should change your description. I was expecting them to come from the 'right' side of the screen, and OH NO, they are coming from he LEFT!! WATCH OUT! (Good Job, anyway).

Posting the scenario with source is helpful in getting the help you need, but it would be wise to start a discussion explaining in what way you need help (being specific, one problem at a time). Just saying you need help would not be productive. So, say something like, 'I am creating a break-out type game and I am trying to make whatever do whatever' or 'I cannot get such-n-such to work. Ive tried so-n-so, but to no avail, and Ive tried this-n-that, but still no-go. My scenario is where-ever called what-ever, supplied with source. Could someone please take a look? Thanks in advance.'

How about having the ships cross the screen at different speeds (but not quite so many of them)? It would be interesting to see if you could also have the ships avoid each other on their way across the screen (give them some vertical movement just to avoid collisions with each other).

It would be nice if 'End' could be programmatically found and set; and have the 'Stack/Queue' switch remove only the water, so the user would not have to re-enter the islands again (and hope it is at least close to what he/she had before), only changing them at their discretion.