Good little clean mouse game. Kind of reminded me of snake.io, but you are eating mice that can run away instead of pellets of food lying around.
I think one thing that could be improve is that right now I had to constantly hold down left mouse in order to be able to catch a mouse. I think it could be better if the boost gave you a more significant speed increase but it also cost you a lot more energy to do so. (Or something like that). That way you would have to really think about risk / benefit before boosting.
But all in all, a solid game jam entry