Video spoils one of the first puzzles, but if it took you more than a few seconds to figure out the first solution he shows then this game isn't for you anyways.
Sick vid
Really cool game, only $7 so no excuses. The constraints imposed by the small number of lines per node and the register system, as well as the fact that the language only has something like 15 commands make the puzzles interesting and quite challenging. Check it out!