YAAC (Yet Another Asteroids Clone)
Fairly simple asteroids demo with various special effects applied, such as Blur-O-Vision and particles
Spooky Shadows
2D lighting and shadows tech demo. This one makes use the PlayBasics world and ray intersection features to model light. This is then rendered as lightmap and merged with the background.
Parallax Platformer Tech Demo
This is updated version of the standard 2D platform game that comes with PlayBasic. Except this version has a number special effects jammed into it, just to test everything out all at once