This game needs quite a few improvements... The performance should be better, training area needs to actually have a purpose, maybe make it possible to bind your own keys, don't let the coins have a limited time to collect or let them pop out immediately, and it's also very annoying that you move forward so much with each attack...
I just started playing, and I found some MINOR spelling mistakes. For example when you start your first fight, it says "chose your fight". This should be choose.
 "Siegius Arena"){kind=icon}