Good news! 'Gon' E-Choo!' is now out on OSX! Linux and SteamOS are next, but I'll need to actually install them somewhere first. If there are any Linux users out there dying to get their hands on the game, speak up, and I'll hurry it up.
Also, by request, the game now includes a game-only option in the pause menu, which simply plays the game on your monitor with no fancy 3D graphics, simulated CRTs, arcade hardware sounds or room echo. Slower PCs should like this mode a bit better, as well.
The game's Steam trading cards have been approved and are now live, as well. I'll be collecting them myself to see if I can get some of my own profile backgrounds.
Keep those suggestions coming! It's good to know what changes are high-priority so I can work on them first.