updating README and adding characters

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Date:      Sun Jan 26 10:37:34 2025 -0300
#
# On branch main
# Your branch is ahead of 'origin/main' by 9 commits.
#   (use "git push" to publish your local commits)
#
# Changes to be committed:
#	modified:   README.md
#	modified:   apply_gravity.lua
#	modified:   initial-characterstats-table.lua
#
