Wondering what you need to do for a perfect combo ? So far I haven't figured it out.

Sometimes I managed to skip through an entire block, resulting in something like this . I'm clearing lines like normal below the first row, so the hitboxes are removed and by box keeps falling, but becuase the top line was never cleared they don't disappear visually, and end up still killing me when it reaches the top. An easy way to fix this would be to remove all lines above any that were cleared, as well as the specific line that got cleared....