You can move with W, A, S, D key.
Jump with space.
To change the power of the weapon use the mouse wheel or the 1, 2, 3 key.
Use the F key to grab a cube, and F again to release it.
Use the M key to open the menu (you can reset the level).
There are 5 types of cubes:
The GREY cubes are basic cubes, you only can grab and move them.
The BROWN cubes can be transformed with the GREY/EARTH power. That will transform the cube in to a "large" cube.
The PINK cubes can be transformed with the PINK/GUM power. That will transform the cube in to a gum, that can attach other cubes.
The BLUE cubes can be transformed with the BLUE/WIND power. That will apply to the cube a wind force that can move you and cubes.
The WHITE cubes can be transformed with all the powers.
You can only grab the cubes in his "base" state.