What you're saying now is totally weird, as I'm trying to run it on a STOCK(!) Nexus 5, and getting the invisible cursor bug, yet you're trying it on AOSP Rom and it works perfectly.
I can only assume that the rendering of the cursor was removed on the stock manufacturer's rom, but not from the original AOSP tree. In order to find it, we'll have to ask a developer with a lot of experience with AOSP code.
Plus, this is not the only problem. I already found out that this app is
incompatible with Xposed framework (Which I can't stop using), and also doesn't work with any SuperSu above version 1.80. (Here's a
link to v1.80 to flash via recovery - from now on you have to ignore updates from Play Store).
To sum up, there are 3 critical bugs in the latest version of this app:
1. Invisible mouse on Stock 4.3+ roms. (works fine on AOSP roms)
2. Incompatibility with Xposed framework.
3. Wifi/Bluetooth don't work with SuperSu versions above 1.80.