Hey bro, interesting game you have here. It's obvious there's still a lot of work ahead so my feedback I guess would be to focus on the main aspects of the game before jumping on designing new content (I'm referring to new levels, cutscenes, trophies, etc), or else you'll be going back and forth between many areas of development and will have to redo a lot of stuff because of that.
My suggestion would be to polish the crap out of the player mech, I would like to feel the weight of the mech's movement, have it wooble around with each step, keep polishing the cockpit HUD which looks really cool, juice the crap out of it in terms of visuals and controls, because once the player mech feels absolutely incredible to play as, the rest of the content will be 10 times easier to include as you progress. Now this is just my idea, feel free to ignore my advice as I also understand that you just might want to learn as you go and doing a lot of stuff at the same time is also a great way to gather experience. Keep at it.