As a fellow newbie, congratulation on finishing your first game! 🎉
But this game definitely needs more time in the oven, the wall jumps didn't feel great or responsive, I'd suggest tweaking it a bit, the art with the background just seem uncanny due to the inconsistency compared to the rest of the game, there is not much of a cohesive art direction, would also appreciate it if you allow ppl to skip dialogue or at least finish the sentence faster, cause it is quite slow for my eyes.
I have a lot more to say but I think the rest of the comments have already expressed my concerns, keep it up and I hope to see some updates!