That's some great advice, thanks guys!
@Manupix - You're definitely right about the depth perception problem. I'll do something about this. Thanks!
@FrostPumpkin - Those are actually big fruits, but I kind of made them look like brains for reasons that are related to the story behind the tree. In later iterations, I will definitely improve it. Thanks!
@Ryumaru - I didn't want to make the character's skin too light for certain reasons, but I'll play around with more colours to make him stand out more. I may add some more colours, too. As for the pic you posted, what you did with the fruits definitely looks more what I was trying to go for. Grotesque and kinda gross. As for the desaturated tiles, looks rad. I'll play around a bit more and post an update in this thread later this week.
I may post some animations of the character as well, so if you guys are interested, please check back and crit my work!
Thanks guys!