It seems like teachers/schools are A LOT stricter these days with monitoring how you use your graphing calc. I was reading on the ticalc forums that many schools make the students line up once a week and the teacher erases ALL user programs in your calc memory - WTF?!? I would be so pissed if I had to go through that. When I was in high school, teachers always told us not to use "cheating" programs on your calc (they didn't care about games), but NOT ONCE did a teacher ever actually check my calculator. Crazy.
I hate to break it to you, but unicorns are not merely horned horses (an assumption you seem to be under).
A lot of horses like to think this, and it's wishful thinking on their part, really.
Real unicorns have many attributes besides the obvious horn that set them far apart from horse-folk. Cloven hooves, a tufty beard and a tail like a lion's, for starters (not to mention they're immortal).
The save thing is, IMO, easily the worst on here. Every game should have a save-anywhere ability, but nowadays, almost no games do. Play all the way through the Xbox 360/ PS3 Turok and you'll know what I mean.