Will you have controller support? It's fine if you don't just asking.
Also Godot 3D is fine, it just takes sometime getting used to. Like how you have to type "translation" instead of "position" which is annoying lol. My experience is kind of mixed, but I only made 1 game in it, so what do i know. Not exactly sure what the differences between Godot 4 and Godot 3 are, as I'm still using Godot 3.5 due to me hearing about Godot 4 bugs ._.
I think the images look great, especially like the fact you made an X out of the bushes, which gives off PSX vibes.
Also i will admit i would prefer something like Obscure (Also thank you, wish i knew about that game sooner, it looks so cool.) However may i suggest having split screen options if you go down that path. Like maybe you can pause the game and go to Options and then change the split screen to vertical, horizontal, or squished (example: sonic 2). Also when you said split screen did you mean cutting half of the screen to add the other or making both screens smaller. sorry if this is a dumb question.