it's probably done in C++
Do you mean absolute blue? since the particles are made with particle candy - a single surface particle library coded in Blitz3D - the game was surely coded with the same language.
[edit] I searched for <"absolute blue" blitz3d> on google, and yep, it's a Blitz3D game:
http://www.intermediaware.de/forum/viewtopic.php?p=47&sid=65df4670ce548ea5648d342de6656d7c