MCsim (pre-alpha release)

[CX gamer]

I fixed a bug that puzzled me for at least a year (and was probably in there for much longer). I looked everywhere and searched for days with no avail. But now it's fixed and the fix was stupid. xD Anyway I've been adding icons to a lot of places, there are now keyboard shortcuts for tool selection and scrolling in the editor for zooming/layer selection. Also there is now a graphic for a solid block behind the current layer, because I was finding it hard to place redstone wires on blocks you can't see. The readme has been updated to reflect these changes.

So now my plan is to fix small inconveniences here and there, and then release an alpha version. For that version I'm going to look for testers who will report any bugs they may find. The simulation should be bug-free, or at least what is expected to be simulated.