Congrats on your first project, really good in that context.
As for critique, honestly gotta join the other peeps in the comments, the game is too hard. I know that's the point but it just starts out impossible for 99% of the traffic you'll get here. Which leads to most players giving you feedback from tryin to get the first jump done for 5 minutes before deciding to drive all over the ocean floor. Which is what I did before finding out about the slowdown... Which made me clear the first jump but then was so slow I didn't wanna continue like that.
There's nobody who'll judge you for releasing a short easy game, especially on itch.io where people wanna get tastes of hundred kinds of games. But I totally get wanting to cater to a niche (especially as I see you've already got a good following on youtube), my first project also ended up with sections far too hard for average traffic.
I'd advice to give the games intro something easier to let people who are unfamiliar tip into what you are doing, doesn't even have to be much, just something short that beginners can get through.
Other than that I also gotta mention the graphics feel bloated. Of course not to downplay the experience you gained from going for this style and the work you put into it, but the final product just looks generic to me and eats resources for no good reason.
I can't give you any specific advice because I use Godot and don't know how things are dealt with in Unreal Engine. But generally speaking I would reccommend to try tone effects down, there's no real need for those reflections and lighting effects. It might feel like an insane difference when comparing it side to side in the engine, but if you have a passable color balance barely anyone will actually take not of the fact that the orange of some block isn't realistically reflected onto another surface.
But then again, knowing which parts of the graphics to turn down while staying within certain style is a hard thing to do. So don't get too worked up about it, it ran for me after turning everything to the lowest setting so you didn't make any catastrophical mistake where the base is only playable with a great graphics card and the lowest setting changes absolutely nothing.