Impossible Game(boy) is a homebrew platformer that was made for GBJAM 9. It is named after The Impossible Game and has graphics inspired by Geometry Dash, both games it also takes its autoscrolling gameplay after. Unlike the latter, however, Impossible Game(boy) is not focused on jumping to rhythm of the music. It is more like the former and Space is Key where visual reflexes are more important to advancing through the levels.
Here, Walgrey plays all four levels and flawlessly gets a Rank of S in record time.
You can play the game here.
Watch a resync of this run being played back on a real console.