with google i've found this :
8-Bit BASIC Competition from Retrospectiva :
It's already been posted on a couple other websites, but Retrospectiva 2012 has just opened a contest for 8-bit BASIC programs (any variant of BASIC for any 8-bit computer is eligible). There's a few rules like it must be written entirely in BASIC (no machine code) and can't already be published or available anywhere online. Should be lots of fun. I created a crappy Hi-Res Apple II game last week to set the bar nice and low for you BASIC experts
But the contest has 3 categories: Games, Music, and Graphics. 3 Winners total and all get a tablet computer.
maybe the site is http://rsp.retrocomputacion.com/