...Shapes are selected randomly from each sub-directory for each stage.
The AppImage file 'mki3dgame-x86_64.AppImage' needs to be set executable on Linux systems. ( See instructions on http://appimage.org/ how to download and execute such files.)
A graphical NBT editor for all Minecraft NBT data sources
NBTExplorer is an open source graphical NBT (Named Binary Tag) data editor for Minecraft. It supports reading and writing in a number of formats including Standard NBT files (e.g. level.dat), Schematic files, Uncompressed NBT files (e.g. idcounts.dat), Minecraft region files and more.