First off, way awesome game!! And very awesome of Andrew to be so involved in the community of enthusiastic users. Thanks!!! Now on to my idea: simple concept of recording a mission by saving the history of all control inputs as "bread crumbs". If a user wanted to improve upon a prior flight path, they could start by playing back the breadcrumb file, then at some point touch the controls to start flying manually again. Thus you could keep tweaking and optimizing your flight trajectory without having to start from scratch every time. Also, you could use this to implement a "race against yourself" feature whereby your breadcrumb file flies as a ghost while you fly the real rocket in parallel, like on some auto racing games. Useful for all kinds of fuel minimization attempts and ideas. Anyway, thanks for a terrific game!