I had no idea what it was with the logo, it's one reason why I haven't played it until now. You make amazing art and it seems like you haven't put a game on steam before(?) So I'll tell you this: You need the main cover image to showcase the game. I would recommend drawing something for the cover art like a Mech instead of using he brass alone. But when you release on Steam, which I recommend for you to do when the game is 100% finished with the effort put in already, people will "read the book from the cover" which means the first impressions matter a lot.
Second thing: You are really introducing way too much at much. There is the shooting and the hard platforming, then you have the bugs SWARM the player and then a rocket and destroy platforms. People are going to get really out of it if you hit them with that right at the start. Explain things instead barely anything like a tutorial simulator for the mechanics.
The shells being a platform, why isn't it explained at all?What platforms can or cannot bot shot and destroyed?
I also think the robot turrets should have less HP since they require a lot of shooting before they die.
But like I said before, you have a lot good going with this, you need to put a lot of consideration of explaining things to the player more slowly, making the turrets resist the bullets less, and making a better cover image. Doing all of this will heavily make the game a lot better now and in the future for new players.
EDIT: Thinking about it, I do wonder why the player's bullets are blocked by the turret's beams and rockets, if they are going to be blocked, then allow them to be destroyed or slowed down, or weakened with lots of hits. Maybe rockets go fly crazy when knocked off course.