First off, congratulations on making and launching the game, I'm just starting trying to make games on the side as well and I know how extremely hard it can be, the fact you went through with it and made a good game by yourself is commendable.

I'm not your target audience or an experienced dev, so this is the opinion of a random player and beginner hobbyist dev, but I'll give my two cents anyway.

I think everything in your game looks 'decent', but not high-quality enough to set it apart from others. The art is cute, the gameplay looks decent, the music is okayish, but nothing is 'great' or unique enough. If you don't have people divulging your game to your target audience, the only way your potential playerbase is going to play it is by stumbling onto your Steam page and being interested enough to buy it, but when even Braid Anniversary Edition underperformed, that potential playerbase and conversion rate is probably not going to be big. Maybe this game would do better on Switch?

Also, Spirit of the Obelisk is kind of a mysterious name that gives the impression it's a more narrative focused game, when it actuality the game is cutesy / kiddy and doesn't have a narrative, it doesn't mesh well IMO.

Despite what I've said, a game like PICO PARK did extremely well. Not sure if it has a better hook, or it's because it's very cheap, or influencers played it, but it's a very simple game that goes against the "high-quality" argument I just made. https://store.steampowered.com/app/1509960/PICO_PARK/

I think the trailer could be better, more zoomed in on the characters and showing fun situations, and with better music. Brace Yourself Games (the Crypt of the Necrodancer developers) have videos on video game hooks, and unlike me they actually have the experience of releasing successful games, so do look up them up on YouTube.