Ahhh...
Very nice.
I don't want to sound like I'm only giving bad feedback, but isn't there a way to fast forward? It's just a little bit frustrating not being able to skip you giving a 20 sec detailed explanation on how to use a button.
(try to speed them tut's up though, The advanced one it's just too long)
But other than that, I mean its pretty good.
On a different note,
I origially thought you'd got the timed explosive thing off the wiki (which I wrote), but Yours turned out to be alot better-
Do you mind if I add a version of your timed explosive to the wiki?
Anyway, to sum up, pretty good
:P