The purpose of that dropdown is not for tagging the tools your using, but it tells us which code to use to attempt to display your game’s files. There’s a separate page for general purpose tagging of tools and engines used.
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Sure, that request was completely separate, I should have created another thread but then I don't know if you would see it. Basically as it is now I have to upload an empty.zip to my product to get billing to work but I will use server API to verify a purchase and the game will be multiplayer HTML5 on a separate homepage. Selling only downloads is too narrow. Also another separate request would be to be able to use username in addition to email on the purchases API.