The original
PBTetris was programmed for a PB625 with a 800x600 resolution. When playing on my HD3 the scaling was tiny and distorted.
I've had a crack at recompiling the source after modifying the code and assets:
https://github.com/neilswann80/pbtetris
It's far from perfect, but definitely more playable than it was. The HD3 has a resolution of 1072x1448, if your pocketbook has a similar resolution it may work well for you also.
You can download it
HERE
I may try and find some nicer block icons as they haven't scaled up brilliantly.