Use WASD to move around. Don't fall, and don't hit the bat.
Thanks @griffpatch for the scratch character. Thanks scratch for the bat. Thanks @Grifkid for the knife, and (most of) the other sprites. This one is the first in a series of updates. The studio, https://scratch.mit.edu/studios/3983089/ , or Spinner of Frustration Series, has all of the games.