here is a patch for tromi, a tetris grandmaster clone. this patch adds the ability to pause and unpause the game during play by pressing menu_decide, and while paused, allows you to quit play by pressing menu_back. additionally, it adds gridlines to the matrix to make judging alignment easier.
the patch may be downloaded here. it was written against tromi_20240408 thus should apply cleanly against that, but may also apply cleanly to other versions should they ever appear. certainly, its a braindead simple patch so it should remain trivial to apply manually unless mycophobia decides to ever remove the codepaths which this patch hooks into.