Changelog - version 0.9.1 :

• Controller assign improvement, now gamepad and keyboard control different player so your are able to play with 2 players on a keyboard and 2 others on gamepads.
• Invulnerability during 2sec for bullet after losing shield
• Adding shader when the player is invulnerable
• Adding a new game mode : Boost off
• Adding audio control setting in the main menu
• Change the shot action for the player 2 on keyboard to the key "Enter"
• Adding aniamtion when you added more player in the main menu