Menu - This is the menu where you select what you want to place. Press space to pull up the menu.
Cannon - Cannons are needed to submit maps into the database, you fire your iZZi with cannons.
Colored Blocks - Colored Blocks are also required to submit a map into the database. This is what your iZZi eats, be careful though, iZZi's only like the same color as they are.
Blocks - Blocks are used for main structure of maps.
Rounded Blocks - These are mainly used to make drop offs or scenery.
Curves - This kind of block is mostly used for tunnels and what it's
name is, curves.
Wedges - Wedges are used mainly for slopes and sometimes in some tunnels.