The mixels could use some work (eg have the ball at the same pixel density as the background) and perhaps use some more shading tricks to make it feel like it has more depth?
Nice and responsive though!
Thanks a lot for your feedback ! Kinda need clear colors otherwise it's pretty straining on the eye on real hardware (too much shading would look awful on gba micro and i must take this into account). i've fiddled with a 3D marble but i like it more with a sprite honestly, i'll maybe add some options about this.