Love the game idea
The match seems to go on for so long with all the animations present, you could cut it down to half the duration if you're not willing to have the timer go down when animations play? I beat the team 5-0 with still around 50 "seconds" left.
Animations could be shortened a little, every pass has an animation where they take three business days to look left and right. I think it could be cut.
I've never played blitzball, but I'm a huge Inazuma Eleven fan. They keep all the non-special move animations there (where they intercept/trap/catch the ball) extremely brief and impactful. They also have this small touch to have the timer keep ticking down even during animations, but give a slight injury time because of all of the animations/or if the team with the ball has the advantage to score a goal (This is also present in actual football games)
Lastly you already know this but the stats are so random, I had one guy be absolutely terrible in all stats to the point of being unusable, even for passing.
I'm looking forward to a version of this game with even more developed mechanics and actual characters. Great work