hopefully we will find time to work last bugs out..
Mine is working well, pretty sure something is misswired.
Or you have running your MCU at 1Mhz.. set fusebits to 8Mhz.
Eventually you have clock divide enabled.
Here are paramters for fusebits for avrdude
-U lfuse:w:0xe4:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m
(Setting internal oscilator, 8Mhz)
Lack of oscilator can issue missbehavior of communication with computer/mouse, but i never had this problem.
The LED2 indicates if mouse is connected.
LED1 should flicker if mouse is moved.
EDIT:
A few Days ago i was asked via PM for new kits, unfortunaly last time i only shipped 2 out in vogons to keropi 😀.
i'm pretty sure i will have some avaible soon.
https://www.retrokits.de - blog, retro projects, hdd clicker, diy soundcards etc
https://www.retroianer.de - german retro computer board