I would've made a more in-depth tutorial also giving more examples of doing stuff with VCE, but this covers stuff up.
You should try adding more "stuff you can do".
Perhaps you can include community events?
Also, player also has <var:pl:itemy> y being 1-5.
Also, worth mentioning that installing Slayer has it's own set of events.
http://blockland.nullable.se/wiki/Slayer#VCE_VariablesAlso, you forgot minigame events.
Also, you forgot to mention about functions.