Survive
Starting your adventure in survival mode in VoxeLibre, you will have to build shelter from hostile mobs (spawning during night time) and to find some food to eat to fight hunger and gain health.
Pick up blocks and build
Target a block of dirt or sand with your hand and click and hold the left mouse button. After a few seconds, the block will be put in your inventory. You see this block now in the action bar of your HUD. To use an item, it has to be in the action bar.
Click on i shows your inventory: You can easily click+drag items from the inventory (the three line grid above the action bar) into the action bar and vice versa. To activate another slot of your action bar, just use the numbers of your keyboard from 1 to 9. As you have a block of dirt now in your action bar, you can place this block somewhere by clicking the right mouse button. As hostile mobs will spawn during night, collect about 30 blocks of dirt and build a wall around you to form a small, 2x3 blocks wide room. As players have a height of 2 blocks, you have to build your hut at least two blocks high.
Next step is to build some tools: Find some trees near your hut and collect the wood. Put a wood block in each of the four crafting slots in your inventory. In the result slot to the right, you see now a crafting table. Click and drag it in a free slot in your action bar and place it inside your hut.
Right click on your crafting table opens a new window, showing the 3x3 crafting grid with result slot above your inventory. Left click on the green book to show your recipe book. In the beginning, it is pretty empty, but you will gain more recipes by collection more different blocks.