congrats on release, as for sale numbers, they will grow after your latest pr stunt:) but it's way harder than a few years ago.
In general wise, if the game doesnt hit a certain niche with some uniqueness and gets some traction, it will barely sell on steam, things changed a lot in the last 3 years, these days Steam is not curated, new releases are not anymore on home page, and lots of shovelware to compete with, so its kinda hard. At the same time, even if your game is good, you are in competition with everybody. Most of the indie devs started with platformers, so they are ton out there. Its quite hard these days no matter how "bad/good" is your game.
And since this is your first game, at least i guess with the current team, it did and it will do quite fine. Very few people did well when they launched their first game, beside those lucky to be the first on the first years of indie gold rush on steam.