Yea I got filtered pretty hard by this. I have no idea how the puzzles work and was only able to start the game by bruteforcing. I wanted to start over to figure it out but it doesn't seem possible to delete your save data.
Needing to press enter at the main menu to start the game is weird.
Needing to hold ESC to use the settings menu is weird. Why not just have it as a toggle.
I'm not a fan of the tank controls. If you need finer camera control you could try tying it to right click + mouse move perhaps. I think this game could work really well with point and click movement.
At the start of the game when the camera is in a bird's eye view, it's pretty hard to tell what direction the player is moving because of their hat.
I really like the aesthetics you have here. Unfortunately I was too much of a brainlet to figure out how to play.