NEW BETA
Okay, here it is, beta release
3 of Stunt Playground. please have a look at the readme, it explains how to use the program.
NEW FEATURES

Textured and re-scaled props and jumps (almost complete)

4 vehicles! (one yet to be textured, others still incomplete)

realtime shadows and reflections! (can be turned off for performance reasons)

new switchable camera angles

replays!! plus you can save and load replays for sharing with friends

sound effects implemented! (still missing a lot)

automatic / manual transmission enabled (and improved)

and more (probably

)
here are some 1024x768 screenshots:
SHOT 01 - basic interface
SHOT 02 - placing objects
SHOT 03 - full interface / game settings
SHOT 04 - driving the "Smart"
SHOT 05 - GT car with dust cloud
SHOT 06 - reflections
SHOT 07 - mustang heads for a bit of fun
SHOT 08 - a shot from replay mode
SHOT 09 - sparks!
and finally, the:
DOWNLOAD LINK - beta 3, approx. 11MB .rar archive.
please let me know of any and all comments you have, especially if you find any bugs. the program creates a (fairly detailed and thus large) debug log, so please post/send the relevant parts if you experience any bugs!
looking forward to your comments!

Independent game developer of (mostly) physics-based games. Creator of "JellyCar" and lead designer of "Where's My Water?"