There are some rings (and I think some amulets) that only work once per day or so, like "haste once per day" or "invisibility twice per day". How do you activate the ring to do it when you want, or does it just happen at random?
Thanks

You first put the ring on your finger, then in the main screen (game interface) just press the little satchel icon on the bottom of the screen. You can then select the ring or amulet you want to use.

On your actions at the bottom, there should be a button that looks like a little bag or purse. If you click there you can use the abilities of items.

For instance, if you were to have the SunRay sword you would activate it through this.

Cheers,