It's reflexion game that i wrote a long time ago, with some of my good friends, and prefered-enemys :-) The game was designed for psychopath, chess player, and others brain owners ;-).

Here are the sources of BNB with in the archive, a precompiled binary with 2 new levels designed by Mark. Thanks to him.  BNB(64Ko) GBA binarycode.        BNB (269Ko). GBA binary + source