This was delightful. I'll admit I wasn't sold by the art in the thumbnail, but the moment I saw it in motion I cracked such a big smile. Really fun implementation of a little mech platformer! I liked that there's limitations on movement to give the player a mechy feel.
One tiny thing I'd suggest is visual feedback that happens right when the projectile fires, like a muzzle flash. It looks like it takes a while to come out from behind the player, making it seem delayed.
But I liked the clear sound feedback when you block, since projectiles move slow. Jump jets felt good too! You gave just the right amount of fuel to not feel stingy, nor OP. I really had fun.