Hey! I'm not sure what set this off, but I encountered a fairly frightening bug I thought you should know about.
I started VVVVVV up, selected the player-created levels and everything completely froze up. I tried pressing all the buttons and going back to the Home menu, but eventually just had to hold down Power until the system went off. Then, when I turned the system back on, all that would happen is the power light would go on, but I'd get absolutely nothing on my screen. I tried turning it off and on several times, turning it on while it was charging, pressing various combinations of buttons, but nothing worked. Then I remembered I had a DSi cartridge in, so I removed it, turned the system on again and, that time, it went on, I was able to run VVVVVV again and I could get into the player levels.
Not sure why this would've happened as I'd loaded up player-created levels several times before and I also had that DSi cartridge in every other time I did so. Incidentally, my 3DS is pretty new (I only got it in December) and, far as I know, I've got the most current version of VVVVVV as the Nintendo Store says there are no updates.
Anyway, everything's fine now, but I thought you should know about it considering for a few minutes there I thought VVVVVV had broken my 3DS somehow! Scary stuff.