diff --git a/README.rst b/README.rst
index 0911885..e7d8262 100644
--- a/README.rst
+++ b/README.rst
@@ -1,23 +1,23 @@
Slacker
=======
-**Slacker** is a clone/parody of the popular arcade game *Stacker*, in which
-you must stack blocks to the top of the screen in order to win the game. Boxes
-will move back and forth at varying speeds. Press Space to stop the boxes and
-move on to the next row. Only boxes that have something underneath them will be
-stacked. As the tower rises, the game will make your tower thinner. You win a
-minor prize at the 10th level (the blocks change color), and if you reach the
-15th level, you will win the major prize. Good luck!
+Slacker is a clone/parody of the popular arcade game Stacker_, in which
+you must stack blocks to the top of the screen in order to win the game.
+Boxes will move back and forth at varying speeds. Press Space
+to stop the boxes and move on to the next row. Only boxes that have
+something underneath them will be stacked. As the tower rises, the game
+will make your tower thinner. You win a minor prize at the 10th level
+(the blocks change color), and if you reach the 15th level, you will win
+the major prize. Good luck!
-This game and the above description was originally written by Clint and
-Jennifer Herron. I forked the game to improve the codebase, make it more
-similar to the arcade game and hopefully add more features.
+This game and the above description was originally written by Clint
+and Jennifer Herron. I forked the game to improve the codebase,
+make it more similar to the arcade game and hopefully add more features.
Installation
------------
-**Slacker** can run on both Python 2 and 3. You can install it using ``pip`` or
-run ``./setup.py install --user``.
+Slacker can run on both Python 2 and 3. You can install it using ``pip``.
Control
-------
@@ -37,8 +37,13 @@ Escape, ``q``
Credits
-------
-* `Original version `_ by Clint
- "HanClinto" Herron (coding) and Jennifer Herron (graphics)
-* `VT323 font `_ by Peter Hull
-* `Tango color palette `_
- by Tango Desktop Project
+* `Original version`_ by Clint "HanClinto" Herron (coding)
+ and Jennifer Herron (graphics)
+* `VT323 font`_ by Peter Hull and Jacques Le Bailly
+* `Tango color palette`_ by the Tango Desktop Project
+
+.. _Stacker: https://en.wikipedia.org/wiki/Stacker_(arcade_game)
+.. _Original version: http://www.pyweek.org/e/LastMinute/
+.. _VT323 font: https://github.com/phoikoi/VT323
+.. _Tango color palette:
+ https://en.wikipedia.org/wiki/Tango_Desktop_Project#Palette
diff --git a/pyproject.toml b/pyproject.toml
index 65d1c63..1c35463 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,14 +18,8 @@ classifiers = [
'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
'Natural Language :: English',
'Operating System :: OS Independent',
- 'Programming Language :: Python :: 3.5',
- 'Programming Language :: Python :: 3.6',
- 'Programming Language :: Python :: 3.7',
- 'Programming Language :: Python :: 3.8',
- 'Programming Language :: Python :: 3.9',
- 'Programming Language :: Python :: 3 :: Only',
+ 'Programming Language :: Python',
'Topic :: Games/Entertainment :: Arcade']
-requires-python = '>=3.6'
keywords = 'stacker,arcade-game,pygame'
license = 'GPLv3+'
diff --git a/slacker_game/OFL.txt b/slacker_game/OFL.txt
deleted file mode 100644
index 7762069..0000000
--- a/slacker_game/OFL.txt
+++ /dev/null
@@ -1,92 +0,0 @@
-Copyright 2011, The VT323 Project Authors (peter.hull@oikoi.com)
-This Font Software is licensed under the SIL Open Font License, Version 1.1.
-This license is copied below, and is also available with a FAQ at:
-http://scripts.sil.org/OFL
-
-
------------------------------------------------------------
-SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
------------------------------------------------------------
-
-PREAMBLE
-The goals of the Open Font License (OFL) are to stimulate worldwide
-development of collaborative font projects, to support the font creation
-efforts of academic and linguistic communities, and to provide a free and
-open framework in which fonts may be shared and improved in partnership
-with others.
-
-The OFL allows the licensed fonts to be used, studied, modified and
-redistributed freely as long as they are not sold by themselves. The
-fonts, including any derivative works, can be bundled, embedded,
-redistributed and/or sold with any software provided that any reserved
-names are not used by derivative works. The fonts and derivatives,
-however, cannot be released under any other type of license. The
-requirement for fonts to remain under this license does not apply
-to any document created using the fonts or their derivatives.
-
-DEFINITIONS
-"Font Software" refers to the set of files released by the Copyright
-Holder(s) under this license and clearly marked as such. This may
-include source files, build scripts and documentation.
-
-"Reserved Font Name" refers to any names specified as such after the
-copyright statement(s).
-
-"Original Version" refers to the collection of Font Software components as
-distributed by the Copyright Holder(s).
-
-"Modified Version" refers to any derivative made by adding to, deleting,
-or substituting -- in part or in whole -- any of the components of the
-Original Version, by changing formats or by porting the Font Software to a
-new environment.
-
-"Author" refers to any designer, engineer, programmer, technical
-writer or other person who contributed to the Font Software.
-
-PERMISSION & CONDITIONS
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of the Font Software, to use, study, copy, merge, embed, modify,
-redistribute, and sell modified and unmodified copies of the Font
-Software, subject to the following conditions:
-
-1) Neither the Font Software nor any of its individual components,
-in Original or Modified Versions, may be sold by itself.
-
-2) Original or Modified Versions of the Font Software may be bundled,
-redistributed and/or sold with any software, provided that each copy
-contains the above copyright notice and this license. These can be
-included either as stand-alone text files, human-readable headers or
-in the appropriate machine-readable metadata fields within text or
-binary files as long as those fields can be easily viewed by the user.
-
-3) No Modified Version of the Font Software may use the Reserved Font
-Name(s) unless explicit written permission is granted by the corresponding
-Copyright Holder. This restriction only applies to the primary font name as
-presented to the users.
-
-4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
-Software shall not be used to promote, endorse or advertise any
-Modified Version, except to acknowledge the contribution(s) of the
-Copyright Holder(s) and the Author(s) or with their explicit written
-permission.
-
-5) The Font Software, modified or unmodified, in part or in whole,
-must be distributed entirely under this license, and must not be
-distributed under any other license. The requirement for fonts to
-remain under this license does not apply to any document created
-using the Font Software.
-
-TERMINATION
-This license becomes null and void if any of the above conditions are
-not met.
-
-DISCLAIMER
-THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
-OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
-COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
-DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
-OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/slacker_game/__init__.py b/slacker_game/__init__.py
index 3f7ff9a..7635b64 100644
--- a/slacker_game/__init__.py
+++ b/slacker_game/__init__.py
@@ -1,6 +1,7 @@
+# -*- coding: utf-8 -*-
# A clone of the arcade game Stacker
# Copyright (C) 2007 Clint Herron
-# Copyright (C) 2017, 2020 Nguyễn Gia Phong
+# Copyright (C) 2017-2020 Nguyễn Gia Phong
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by