Gamepad 12 buttons (LEGO Marvel's Avengers)

Good afternoon. I decided to remember my childhood, and just have fun with my little brother and play Lego Avengers. In general, the essence of the problem is this: there is a gamepad with 12 keys. When setting up the controls, the game asks to enter more than 14 keys (as I understand this is the norm for all kinds of HBboxes, etc.) How can you play it without a gamepad for 2 plus thousand rubles?) The option with two players on the keyboard is not very happy.