How do I emulate a mouse with my keyboard?

I am trying to play GTA: San Andreas with a bluetooth keyboard when it thinks i have mouse too (I DON'T HAVE A TRACKPAD ON MY KEYBOARD) so while playing it the camera goes crazy. Arrow keys don't work so I can use that as the mouse. My question was : Is there a way to emulate a mouse using a keyboard? Specs: MTK 6582 1.3 GHz QUAD Mali MP 400 also QUAD<- This is useless (but just for compatibility) RAM 1GB Android KitKat 4.4.2