I've not included the full set of invaders because of performance issues on my machine. With 20, it runs ok at the moment, but it can run quicker when run from a website, so it might be ok here. There are a couple of little bugs in there that need ironing out and I've been rough and ready with the multiple levels. This needs a bit more work really. For some reason, the behaviour of the bug's 'gloop' differs on the website, sometimes it goes straight through the buildings, which it doesn't do at home. But then I've noticed scratch do some very weird things sometimes, not clearing down variables, not resetting costumes etc etc. I'll include some project notes if anyone's interested.