I just wanted to get some tips. I have a feeling it is too stiff but I'm not very good in single player so I'm trying to improve.

i think it isnt so bad ... 2 or 3 advice to improve u
-u must be careful at your head ( uke did about 70k points because it touched your head more or less 5 times)
-Try to forget the concept of both leg extended or contracted and u should be a bit more laxed
continue to practice

Thanks for all the advice. I made one more replay. This is not a madman, just two kicks.