crystalminer
Symmetry and crystals, block by block: a 3D museum and 23 symmetry worlds where every block you place is copied by the world's symmetry.
Not playable on a phone
crystalminer is played in first person on a bigger screen: a laptop or desktop with a keyboard and mouse, or a tablet. Open it there:
crystalminer.online
Turn your tablet sideways
crystalminer needs a screen at least 800 pixels wide and 560 high. The game starts by itself when the tablet is in landscape.
The window is too small
crystalminer needs a window at least 800 pixels wide and 560 high. Make the browser window bigger, or zoom out (Ctrl and minus, or Cmd and minus on a Mac): the game starts by itself.