PetraVis (previously known as Steinkraft) is a game that places the player into a world made of unit sized cubes. Cubes can be removed and new cubes can be placed nearby other cubes (block extrusion). New worlds can be generated. It is inspired by BlockWorld and Minebuilder.

Instructions:
Default Input & Opposed Input: (can be selected in the settings menu)
- Use the two virtual analog joysticks to move around and rotate your view.
- Press the circle on the top right to switch between dig- and put-mode.
Alternative Input: (can be selected in the settings menu)
- Use the joystick on the bottom left to move around.
- Drag across the screen to rotate.
- Tap&release very quick to add a new block.
- Tap&wait and then release to remove a block.
For any input method:
- Tap the circle showing a jumping stick figure to jump.
- Press the button centered on top to go back to the menu (progess gets saved).
- Tap the texture on the top left to show the texture selection overlay.

Double tap the jump button quickly to toggle fly mode.
Detonate explosives (TNT) by placing fire (block left to it) near it.
In settings press twice on ALT so it says "ALT xPAD" to enable standard controls again.

Currently implemented features include:
- Procedurally generated terrain.
- Flat, sphere, pyramid terrain.
- Simple lighting and shadows.
- Removing and placing new cubes.
- Rudimentary (W)LAN two player multiplayer.
- Explosives (TNT)
- Torches and ladders.
- Little animals.
- Transparent glass.
- Flowers and mushrooms.
- Rails and carts.