One or two players. Use a mouse or trackpad, keyboard (including Touch Bar), or 1-2 game controllers. “Celtreos” is like the space shooters of decades past: tiny ship, big weapons, waves of foes, power-ups and obstacles. Music, Sound and Voice Several different songs in demo (full game has 30 songs and over 45 minutes of music!)You can even play your own music and auto-next-song for key game events Stages 3 stages in demo (full game has over 12 stages, including a space station, ocean and more)Horizontal scrolling but more than one “screen” of vertical spaceStart from any stage you want!Each stage ends with a challenging bossSpawn patterns are partially randomizedWeapon Arrays, Special Moves, Power-Ups and More Choose from a huge arsenal of weapons and special abilities10 different ships to choose from Customize ship properties, such as gun mount locations and top speedIn-game power-ups with weapons, defenses and temporary powers (like Rapid Fire)Power-down orbs with temporary inconveniences (like Weapon Freeze)Additional Configuration Options Set number of lives, and number of times that special abilities can be used Play in a window or in Full Screen, and specify how much of the display to use in Full ScreenSet graphics quality to one of three levels