1. Steer the bicycle using all 4 arrow keys.  (go left, go right, speed up, slow down).
2. You need to drop off the appropriate colored letters for each corresponding mailbox.  Toggle between the 3 colors using the space bar.
3. You are penalized for delivering the wrong colored mail.  Basically, the more mail you deliver, the more points you'll get.
4. Watch out for traffic, bouncing balls, lawn movers, dogs, street curbs, manholes, etc.   You can only drive up onto the curb using the ramps.
5. To start the game, let all the components load (it's definitely worth the wait).  Next, click on the little black arrow in the bottom right hand corner (next to 'Nęste Bud')... keep clicking through all the instructions until you see the image of the guy with a dog chasing after.  When you get to that screen, simple press any key and the game will begin.  Have fun!