How can I share a game here for feedback before I launch it?
An option can be to build it and upload the builded version here: Gofile - Free file sharing and storage platform
After you have uploaded it can share the download link on your post.
Upload it on Gamejolt and use the access key system to restrict access to the one with the keys, generate ≈10 (there are not often more than 7 persons looking at other’s games) and post the access keys with explanations