@mudmask About the sprite styles, I had a thought:
I just only realized now that your stage sprites use black as a shadow, while your original player sprite and enemy sprites never include black. I think this is important when it comes to determining your art style.
Personally, the preview that comes together perfectly style-wise is the "Drone Exploration with 8bit darkness". The drone uses black as its shadow, as do all the tiles, and the light effect. Second would be "Update - simple boss behavior and event flag", but without the new player sprite. The boss, and the drone, are great examples of the character fitting the style.
I think if the player sprite matched this palette, it would be a perfect fit. The new player sprite has the addition of a highlight, rather than the inclusion of a shadow, which makes him stand out from the rest of the style. He looks almost 16-bit, now.
Anyway, food for thought, if it helps! I'm really looking forward to this game!