This was a really amazing game! The controls felt so perfect and the implementation of sumo wrestling rules were fun and intuitive to learn. The only downside I can think of is, despite having a long playlist of songs to keep things fresh throughout the whole game session, none of them are what my mind would immediately think of when I hear "sumo" or "skateboarding". I was expecting something along the lines of J-pop meets Ska.
Either way, Kudos! I hope you continue developing this game! I could see it as a fun little indie title!