Another update :

• Fixed sound problems on Windows this time (if you don’t flush buffer after playing, java will repeatedly play last buffer)
• Fixed performance issues on Windows (mainly because I didn’t test the game enough under windows, there are some small differences that were causing troubles)
• Added a multi-thread support, if your computer has more than 1 core/cpu it will be automatically enabled (F3 to switch). It increases performance nicely.

I’ve also added a small video of the first level on youtube :

I’ve finally bought a fraps license to record it, I couldn’t get any other screencast software to work correctly. Encoding has changed colors a little, but it’s good enough.