The style of this is very Amiga inspired, the graphics reminds me of Bitmap Brothers games, and the boss music sounds straight out of Wolfchild.
Apparently, this game was actually a 1993 Amiga game called 'Shenandoah: Daughter of the Stars' and had a demo out in game magazines, before getting cancelled. So it is kind of an Amiga game.
Screenshots marked with 🍒 are created by syltefar and are considered public domain, free to use for anything. If you want to, you can note where you found it and link to this page.