Illusion Spectre is an upcoming boss rush style game created by Tay (@PixelsTay) heavily inspired by Treasure games (Alien Soldier and Silhouette Mirage being the biggest ones), so that means color changing, dashing and challenging bosses.
Something about Starry, The Star Reaper trying to stop the evil Lord Solunar (okay, this is seriously leaning into Silhouette Mirage territory of story, wth).
The only issue I have with the demo is the sensitivity of the joystick, like the character looks left instead of right, raise that sensitivity to 30%+, so that doesn't happen. Otherwise, it's good.