Thanks for playing!
When you press "1" you would change your tool (currently only the pickaxe is implemented) and it will not activate the slot. Is this what you mean? I'm not happy with the tool selection either, I might add Q E to scroll through tools or something like that.
I really like how you compare it with Minecraft 2D because this was exactly my words when I first published Ore Miner 1 XD
SquareWorld, a game also playable from my launcher (currently in alpha) does even more look like Minecraft, because it's a building sandbox :)