Once injected run the command elytraon and after that its your preference what you want to do, commands are listed below.
fov - Toggles fov from 90 degrees to 180.
rapidfire - Adds rapidfire to ArenaGuns and some Paintball weapons.
dev - Enables developer and unity developer console.
god - Makes local player invincible.
fly - Enables fly.
bounds - Places hitbox outside of bounds, good for respawning/killing yourself.
antigrab - Disables item grabbing.
elytraon - Initializes and starts elytra.
elytraoff - Uninitializes and unloads dll.
You can inject this using process hacker, insane injector, dll injector, anything really that works for you.