Sources are: Dragon Buster (The port of the Family Computer (NES) version at Namcot Collection in Nintendo Switch) Dragon Buster (The port of the arcade version at Namco Museum Vol. 2 in PlayStation)
"Python 3.9.4 is a hotfix release addressing an unintentional ABI incompatibility introduced in Python 3.9.3. Upgrading is highly recommended to all users. "