Part of the satisfaction of Rktcr is that it presents a number of difficult challenges and doesn't hold your hand while you are playing. However, in case you do want a bit of hand-holding (and some high-level strategic tips), I've created a series of videos.
These videos go from the very simple -- the keyboard controls and the notion of selecting from futures -- to more advanced concepts around momentum reversal, smooth control changes, straddle jumps and more. Better yet, all the levels in these videos are in the demo, so you can play along.
This will almost certainly come in handy... thanks!
Best of luck!