Just had a look at it. It looks very nice! But I assume you know that the armor gives white boxes around your body.
Also will you add dungeuns? with the skeltron and old man? (NPC)
Maybe you can somehow try to make the layer of bedrock so it`s like the deepest part in terraria with the worms and stuff( I tottaly forgot the names)
Wow, this is amazing. This is just a suggestion, and other people might have mentioned it.
You should make it so you don't actually have to craft the items. Everything should be a lot like Terraria. You would press your normal inventory button to open the crafting thing. You can't craft shovels, and you can't break wood or anything else unless you have the correct tools. Every other item you can craft would be crafted through that inventory too, such as pickaxes and other items.
That wouldn't be too compatible with other mods, though. I like this a lot though, and I'll try it right now.
EDIT: Of course, you would start out with a copper pickaxe, shortsword, and axe.
Holy crap you are the best terraria mod maker EVAR! If you can make guns can you like make a gun mod or update sdk's gun mod? I really need a gun mod to play. If you do make it, make it for bukkit and just regular single player.