If you can get to levels 10, 20, 30 and 40 without losing a life, a magic door will appear to take you to a bonus screen, and if you can get up to stage 50 without losing a life, a magic door will appear and take you to level 70. On levels 7 & 22 wait a few seconds until an umbrella falls and grab it, you will warp ahead 6 levels. Alternatively, try these:

‘F1’____________________To advance 1 level.

‘F2’_________________To advance six levels.

‘F3’______________To advance eleven levels.