First off, I love quicksand. What you did with Minecraft quicksand is very fun and clever. I love how Toughset is trying to dig you out, and you're just sinking there enjoying the moment. Also, good job with the 3D shapes like the quicksand blocks. The only complaint I have is I think the textures and shading could've been better. Although, I feel that you could just say that the background is a texture pack, but that previous complaint is just my opinion. It's very good and fun and I love it. I recommend doing more quicksand art, but that's just me. Good work.
I don't quite remember what went through my head when I did this. It's been months. But I think I went for the simple 'texture pack' feel just because this was a minecraft scenerio (and we all know how 'not-detailed' the normal textures are XD
Either way I'm glad you like it, and I thank you for the critique