Columns II is a Tetris-like clone...however, it has color-based rather than shape-based playing pieces. There is probably not enough variance in the color shading on a B&W to enable serious playing.
Tetris comes with Ensemble20 (the desktop suite running on the GEOS20 operating system...different/more applications but the same GEOS20 as in your Zoomer.)
I tried Tetris in the PalmConnect (which is also GEOS20, but mirrors the Zoomer files), it didn't run...missing the game library system file...and, that file is *not* on your Zoomer ;-(
The Hearts in the QuickShuffle package is nice on the Z...
Love...Mother