Really fun concept. I'd suggest changing the color of the "Submit" button because (at least on Firefox) to my eyes it looks like it's disabled.

It took me 4 tries to get today's game. I remember playing it a lot as a kid on a clone of NES that was really popular in Eastern Europe at the time :)

Aside: why are .game domains sooo expensive? I'd love to get one for a game I'm working on but I can't stomach paying £300/year to register the domain :/