Hey, thanks for trying out.
The combo system was a thing that was added at the last moment, so it's not a very fleshed out one. Other ideas was a combo system that keeps going up with each timed landing, but the collision behavior was rather fast and tricky.
Still, I've tried to make it happen that it usually lands on the same number if it's at an average jump, maybe it's an idea to land faster once you can time the jump. But I've yet to figure that out