Hey there! You should be able to play it via keyboard with directional arrows and buttons such as: "a", "s", "d", "q","w","e" or with a joypad. You can also remap your controls. Are the controls completely frozen?
Minor bug report: Reynard displays the animation for moving to the right when he is moving up-right, but the animation for moving up when he is moving up-left. I think the intention was for Reynard to display the running up animation when moving up-right.