I'm glad you guys like it so far. Right now you'd need two gamepads to play the game in coop and is something I hope to be able to remedy in the near future. The remake is currently in active development with lots of new stuff being worked on, this includes new content, new features, new options, etc. Keybinding is on the list and will be something I'll try to implement very soon. I hope to be able to offer a toggle option to switch between 2 gamepads, to keyboard/mouse and gamepad configuration.
I'm sorry this isn't currently a feature but I want (need) to have in the game asap.