The Overmax version is not called tetris. It's similar to Tengen. 16x24 visible. Flat side down orientations are pushed down by one space. Wall kick is wall only.Spawn orientations and colors and positions:

I: red
J: yellow
L: purple
O: blue
S: green
T: orange
Z: cyan

Edit: I just got a knock-off handheld that was 101 in one...