This game used to be fantastic, but I imagine due to the flash emulator, there's a lot of new problems with it. Certain text, I imagine specifically the ones displayed from variables, just don't show up, which makes inputting your name in arena very difficult.
After dying in arena, the game doesn't know what to do, and just soft locks on your body.
Pausing and unpausing at this point just unfreezes the enemies and they hop about your body.
I'm not sure it's actually possible to progress in arena anymore, unless this is an odd issue specifically on my end.
But I remember this experience being much better! I know it has to just be because of the emulator used, which is unfortunate.
EDIT:
I'm pleased to say that after not being a dumbass and reading the description I found the tutorial video on how to get this working properly. Absolutely fantastic experience, love it every bit as I used to.