thx guys!
yes those buttons work already
I was planning to put some pictures on them :) but I'm gonna remove them for the scirra arcade version.
I've already managed to fix some overlapping issues, but now I need to fix some control problem :
-when you hit left (or right) 2 times, it sometimes moves 1+2 blocks instead of 1+1
I like those games since I played the gameboy and arcade games a lots.
I maybe gonna do a "Bust a move"-like game next or improve my breakout game.