Bueno consultando un manual muy simpatico que encontra vi esto, espero que os sirva:
My mouse pointer is too dark and too small.
By default the MK802 comes with a dark blue wallpaper with a black mouse with a dark blue outline. Therefore on some screens it's close to impossible to see.
One thing you can do it to change your wallpaper to a lighter color, however, even that is insufficient depending upon screen glare, what's being displayed on the screen, etc.
So another thing you can also do is to change your mouse pointer. That's right, change the actual image being displayed as the mouse pointer. Here's how:
NOTE: BE CAREFUL as the below procedure is delicate and you could mess up your boot situation if not done right.
Go into /system/framework (doing this is left as an exercise for the reader as this by itself has many choices that would be muddled to go into here).
Make a copy of framework-res.apk on your local disk.
This .apk is an archive file. It contains various files including res/drawable-mdpi/pointer_arrow.png
Create or download a practical image file of your own. As an example, we created this bad boy android who looks like it's holding an MK802 in its hand
based on one of the other images. When done name it pointer_arrow.png
You can update replace it in the archive if your archiver allows you to do that. Just remember that its full name in the archive will be res/downloadable-mdpi/pointer_arrow.png so you may have to create res and res/downloadable-mdpi folders and move pointer_arrow.png into there.
It may also help to extract the whole archive a few steps back and then rebuild it, it's up to you. Just, in the end, try not to muck about with file permissions and ownerships with the files within it or of the .apk itself. So either way try to use same permission information when possible.