Hello!
Actually there are keyboard inputs :)
This game was designed for the Nintendo Switch initially, that's why we highly recommend playing with a controller.
Nonetheless if you wish to play with your keyboard AND your mouse, here are the inputs. You will need your mouse to play!
I need to warn you, we are French, thus we developed the game with French keyboard inputs! (just install a French keyboard on your computer and switch inputs, it is simple)
Mouse Left button: Poke action (using you violin bow, can be performed in various directions: up / down / left / right)
Z: up input for violin bow use
Q: run towards the left
S: down input for violin bow use
D: run towards the right
A: Play your violin (Y input on a Xbox Controller)
Space bar: jump (analogical, the longer you press, the higher you jump)
P: Pause Menu (presse again to exit menu)