Use the mouse. Destroy the fuel depots or you will run out of power. You *must* destroy the final baddie to end the game! You can complete the game in one run in 2m 45s but it may take you a few weeks to get that good! See http://www.youtube.com/watch?v=teoKlYb3Hdk for a play-through of the original. There are some small but insignificant differences. I wrote this based on that video and the graphics come from taking screen caps of the video.
Based on Acornsoft's Rocket Raid which was itself a clone of the arcade game Scramble. I had to restructure the code a bit when i discovered the limit of 300 sprites and there are still a few minor rough edges due to that, but it's very close to being widely usable. The Acornsoft version was written by Jonathan Griffiths. Also a big tip-o-the-hat to @illusionist for the final boss screen, if you ever get a chance to see it. TO DO: add sound samples and place remaining objects; any fixes and improvements from remixes will be fed back in to this master copy. WIP: Looking at adding a highscore system - currently trying @SarkyKeshy's http://scratch.mit.edu/projects/14506829/ Bugs: a few. Probably the worst at the moment is that you only get 3 ships whereas you're supposed to get 4. (initial one + 3 replacements) This did work once but I carelessly broke something and it's been so long since I worked on this last that fixing it has to be a quick hack. I swear I will return to this one day and fix it properly!