Slider, started implementing risk factor, moneys, new animations

- There is now a “win” screen - press F as a debug feature to skip to
winning a level
- Added sliders as a GUI element
- Started work on a selectable “risk factor” - the point of the game.
- Removed self-deprecating remark from title screen (top lel)
- Preliminary work on money, added new art / animations for all planned
money types.