Thank you for your kind words :') I'm glad people enjoy this game and hope you will like the long-overdue update when it will be ready.
As for the 2D controls, is there something specific that you could suggest to improve them?
It's not that big issue but I was frustrated about 2d controls due to the jump and crouch inputs for keyboard are W and S, whereas in 3d they were normally SpaceBar and Ctrl, so it took a little time to get used to, i think playing with controller would be fun.. So according to me you could just add custom input-key options for player to custom pick keys they want for specific actions like jump, exactly like you created for weapons hotkeys.
Thanks for the suggestion, indeed customizable keyboard input would be helpful. I'll make sure to add it, it will take a while though since I'm already behind on more prioritized work.