I like your choice in palette contrast although it strangely still seems to come across as flat. I apologise if that was indeed your intention but given the light source it looks like you were going for an embossed block?
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EDIT N/A
Yes I was going for an embossed look of that block.
Im still realy new to pixel art ,so Im not good at shading and stuff like that.
Maybe it would work if I add dark blue to the shadow, what do you mean ?