Forgot to make one thing clearer in my text. So when I said that I couldnt keep my hand on mouse and another at keyboard currently, it had to do with Jumping. WIth normal keyboard I could have used my left thumb for jumping with spacebar, however, with my special keyboard space is actually no bigger than "return" in normal keyboards (actually even smaller) and it is situated in such place that I am supposed to use right thumb to press it. Therefore because I could only beat using mouse (with right hand in my case) and I could only jump using Right Thumb, and movement had to be done with left hand, therefore Jumping and beating without changing hands positions first wasnt quite an option for me. With normal keyboard this had not been a problem.