Developer Guidobot just released MilieTetris for PS Vita. MilieTetris is a nice looking Tetris Clone (which for some reason is in grayscale. Why not.).

Guidobot gave a lengthy and in depth description of his homebrew:

Just a tetris for henkaku

Then again, do you need to know more?

Download and Install MilieTetris 1.0

You can Download MilieTetris 1.0 for PS Vita here.

To install MilieTetris you will need a PS Vita running firmware 3.60 and using the HENkaku hack. To install and run HENkaku follow the instructions on our PS Vita CFW page.

Looking for more? We have a growing list of available homebrews for the PS Vita here.

Source: Guidobot on /talk