Change the controls left right to a and d and block select to something like 1 and 2. Currently if I use with mouse it feels weird with space and arrow key.
The thing is that when you try to use movement and jump, arrow key and space is ok if it is just keyboard but when you include mouse controls, it become hard to use. Just think of a fps games. wasd to move, mouse to aim and shoot and space to jump. every keys should be without left hand control and right hand to control the mouse.