Forget-Me-Not build #4 update

hello! i uploaded a new build of FMN-R.

- added a framerate cap option
- added customisable keybindings
- some random generation & look/feel tweaks (rubble particles, fake slowdown, etc)
- i put fruit back in
- there are now 3 game modes: quest, pondskum & dusktangle
- new demo build
- other things
- mac build will be along in awhile..

the three modes with silly names are: [quest] orig style, endless, gradually gets harder.. [pondskum] you're trapped in one level and the flowers keep growing back and the walls keep being blasted away.. [dusktangle] you fly through levels in random order