Dropbear (GMTK 2019 version)
An entry for GMTK 2019 - Only One.
This is a single-button, single-screen platformer where you can't jump. 'Space' instead makes your bear face the opposite direction and he will walk in the direction he faces, dropping straight down any holes.
I ran out of time building this after the core mechanics were complete so there are only 4 levels. The sounds were quickly (and poorly) made using Bfxr and I didn't have time to even make a simple background music.