Really Cool (especially for first submission)

That was short, but very sweet. Cool animation, you didn't really skimp (it looked like each frame was individually drawn), and it was just fun to watch. The sound added to it a lot, though it would have been great anyway.

Made me lol.

I thought this was funny, especially the prologue thing; that wasn't annoying at all (like some people said.) The end made me jump out of my seat almost, and ironically I was holding the bar for the volume at the time, so when it happened I spazzed and turned it all the way up. Anyway, good, but I'd like to see what you've actually been working on, if it is in fact that big.

Rather trippy

That was the weirdest thing I've seen in the past month, probably.
Excellent.
That was mind-bogglingly insane, but I loved it, and that was a good point you made at the end. So I give it ten. (yay, ten)

Really Good!

I love simple ideas like this, and I think the difficulty escalation should have been faster in the beginning (less boring/repetitive) but slower later on (too hard). It did start off a little boring, but it got very exciting when you would be juggling three things at a time and have four factors per number.
So yeah, good job. Simplicity is a plus, don't add powerups or whatever.