1. No preloader, but it's only like 3 MB. A preloader doesn't even make it load faster anyway.
2. It's not too hard. This is a collecting game that's both luck and skill, but the only difficulty value is if you compare your scores with someone else. There is no winning and losing.
3. Sorry there's only two graphics of old people... Rivz drew them by hand, so you can't duplicate it and edit it as you please.