This engine is a gem of making HTML5 games, since I just saw Godot go Steam recently, submit to steam should receive more attention and support.

Just 2 cents, as Superpowers are more user friendly than many available engines on Steam already.

Guess it wouldn't be Open Source if it was on Steam, though? (I think)

Godot is Open Sourced, Aseprite is Open Sourced, and some more....

Hey! I think we should look into it (and decide whether submitting to Steam is a good idea or not) after the redesigned app (v1.0 and beyond) is out.