For now, I'll keep you busy with the first demo level of Emerald Caves - House of Ruby!
Do you think you can beat the final level of Emerald Caves? If yes, then the rest of the level should be a piece of cake for you. In this level you'll see:
Ruby - Diamond Caves's exclusive gem - it's worth 2 emeralds.
Wall (Ruby) - It contains a ruby inside. Blast with bombs, or use a hammer to get the ruby.
Hammer - Collect it and snap walls and chests to break through.
Chest - You need a hammer to break the chest.
Tube - Now you can see yourself inside tubes!
Mine (Explodes on contact) - Explodes and kills a creature (The player is no exception). Can explode too, if smashed by a rock.
Teleporter (Red) - Teleports the player into the second teleporter. If you press the teleporter for a tiny moment, you'll die!
Level Wrapping - Allows you to travel between level borders. This is the only non-versatile addition though.
Feel free to use those new elements in your level sets as well. Good luck with the level and stay tuned!

(Soon, you'll see some big booms...)