Hi Dave!
Thanks for testing and for your suggestions. I'm already working on version 1.1 to fix some of the issues you mentioned. I'll take your suggestions into account in case I can apply any of them in future revisions.
The pause feature is the one I'm least keen to add, as it takes away from the arcade spirit of the game. However, quite a few people with prostate problems are asking for it, so I guess I'll have to do it ;-P
In the meantime, one trick would be to find areas where the sentries can't reach you so you can go to the toilet in peace ;-)