I’ve just uploaded GearHead Caramel to itch.io. Its price there is $10, but you will still be able to download the game from GitHub for free. Think of it as a throwback to 1990s shareware. I hope that if you enjoy the game you will consider buying it to support development.
If all goes well, later on I would like to upload all three GearHead games to Steam. I plan to use the 3D models I’m currently making to fill in all the missing mecha sprites from GH1 and GH2.