Works fine here, both on emulator and a real nds (phat). The only difference between emu and real hardware I have noticed is that on real hw the red line is shifted a bunch of pixels below the stylus position :think:

I have the last libndsfpc, the last libnds and fpc4nds 2.1.4 installed.

Edit: I have tested the executable on a slot1 (DS-X) and on a slot2 device (M3 SD Perfect).