Courtesy from Xyphoe.
== Implementation details and use of Plus hardware ==
* Mode 0 is used in game for the play area, mode 1 is used in game for panel.
* Plus palette is used
* Plus raster interrupt is used
* Plus soft scroll is used (the left column is also masked)
* Plus DMA channel 0 is used to generate interrupts to do the background sky effect in the title screen
* Plus DMA channel 1 is used to play the title music
* Software sprites are used for enemies in the game
* Plus sprites are used for the player's aircraft and the shooting stars in the title screen
* Plus split screen is used in the game (it is switched between the panel and play area)
== Links ==