Compared to the previous Setris, a few of my main gripes is that the pieces are falling noticeably faster than before, making it hard to clear up necessary space on the board. In addition to that, the sand physics don't match the speed (or should at least be faster too to compensate for the faster block drops) of the blocks falling, so the sand doesn't have enough time to spread out, even on the easiest difficulty. Aside from that, there is a weird discrepancy with how the sand spreads out when against the left side compared to the right side, where it incorrectly fills up from the bottom-up, instead of from the top-down, like sand on the right side does.