Land the rocket on the yellow landing pad. Use up arrow to turn on the rocket. Use left and right arrows to point the rocket. To win the level, land on the landing pad at a nice, slow speed. Pressing n is the same as clicking Next Level. It also skips the intro. Pressing a is the same as clicking Again. Pressing b turns the background music on or off. Pressing i turns the instrument panel on or off. Pay attention to the instrument panel. Fuel is very important: once it reaches zero, your rockets turn off for good! Your altitude is y, and your left-right position is x. Your vertical velocity is vy, and your left-right velocity is vx. Angle is the heading of the rocket. To win, you must land on the landing pad, your vertical speed (vy) must be under 2, and your horizontal speed (vx) must be under 1.
If you leave the visible area, you can keep flying, using your instrument panel (the numbers on the upper left of the screen). Press "i" to see the instrument panel. Press "i" again to clear. Hint: Keep your drift rate low. Use retro-rocket action to control your drift direction and rate. For more rocketeering fun, try my Orbital Simulator: http://scratch.mit.edu/projects/10398130. The soundtrack is "Feeling Dark (Behind The Mask)", by 7OOP3D. It is licensed under a Creative Commons license. See http://loop3d.restorm.com/songs/34616.
