jSfxr
A simple 8-bit blip, laser, coin and explosion synth, heavily based on Dr Petter's awesome sfxr. It uses Beads for sound synthesis and Processing (with controlP5) for the interface.
Source code: Jsfxr
The best way to start is to click one of the preset buttons (under the word "PRESETS"). Then start varying the parameters to get a feel for what they do. mutate and random provide alternative methods for exploring the sound space. Check out sfxr and Dr Petter's site for a description of the parameters and some theory, etc. Have fun - BP 040409.