Controls

Controls (shared):
0..9 - change tool
LeftMouseButton - create blocks
Shift + LeftMouseButton - delete blocks
Space - jump

Controls (scheme 1):
WASD - move around
Q\E - switch tool
F - switch layer
R - tool menu

Controls (scheme 2):
Arrow keys - move around
Numpad 1\2 - switch tool
Numpad 0 - switch layer
Numpad dot - tool menu

Controls (scheme 3):
IJKL - move around
U\O - switch tool
H - switch layer
P - tool menu
B + LeftMouseButton - delete blocks

Information: Getting around

By default, you appear on the platform, which is not connected with anything. To reach other islands, you need to construct 'bridges' - place blocks on bottom layer, which you can walk on.

Information: Blocks

Most of block types are just solid blocks, however some have additional properties.
Grass - slowly spreads to nearby dirt blocks. If a shadow-casting block is placed above the grass, it is destroyed (turns into a dirt block).
SunStone - illuminates the area around it with soft yellow light.
Glass - the only solid block that does not cast shadow (can be placed over grass blocks safely)
Chest - can be found in structures, and contains random amount of one kind of blocks. Click these to get contents.
Diamond - provides short-range blue glow around it.
Foilage (bush\tree block) - turns dirt blocks below it into grass after some time.
Forbidden block - can be recognised by specific patern. These blocks cannot be created nor destroyed.
Block of Creation - slowly produces one of selected block types.
Clicking it will bring up a menu, where you can select new block type to be produced, or collect already produced blocks (by clicking top-right block). These blocks cannot be modified as well.
Color block - a fairly rare block kind (can be selected from 4th item in 2nd row of tool menu), which can be adjusted to have different colors. After placed, click these to cycle color forward, and Ctrl+click to cycle color backwards.

Credits (just in case you missed the title screen)