Ooh, this is exactly my jam - late 8-bit with a 2-bit, subdued palette and super clear layer separation. The vertical sections really shine; the gear biome is gold (love that platforms are solid while the backgrounds are “wiped” - readability is top-notch). Edge/pixel-perfect jumps feel fair, and the jump has that nice, “gravitational” weight.
If I could add two cents
In the gear biome, I’d slightly dim the inactive cogs so they don’t compete with the active platforms.