Everyone loves a chart, so the match progress "score worm" is a great feature! However, it's a standard line chart when it really should be a step chart. If it's possible to change, this would allow for much more accurate comparison of scores at different times in the match.
The chart also ends each line at the point of a team's last goal, rather than the end of the match. So if one team doesn't score for the last few minutes of a game, their line is significantly shorter.
I'm not sure what graphics library you use, but perhaps it has a step chart option?