Use Arrow keys to move, space to attack, f to arm the trap, while you are touching it. DEFEND THE CRYSTAL!!!!!!!!!
I don't need to give credit, I helped make the original; @beatboxx is a colab between me and @dany333. If you want the zombie/ogre/goblin/troll things to move slower, see the original project: http://scratch.mit.edu/projects/38853700/