MasterMindDS by Nikolas Neo Flash Compo 2005 Edition

So here's my entry. MasterMindDS.

MasterMind is an old board game in which you're supposed to figure out the color code. First guess, and then try to figure out with logic (or then just guess some more).

Buttons:
D-pad == Change slot
A == Next color
B == Previous color
X == Check
Y == Music ON/OFF
SELECT== Credits
START == Help