The purple of the chest seems too dark, but otherwise... MORE!

I haven't, but I just looked it up and it looks like fun. I'll be sure to give it a try!

Thanks for the feedback! I lowered the contrast of the background so it's less distracting.

have you played psycho waluigi?

WAAAAA

Looks good. The background is a bit busy though, makes it harder to see the characters.

Good use of the color palette of the GB Color. 
Nintendo should make a Waluigi game.