Update: I tried arena mode and it's fun, but the robots get really close to you and it's hard to avoid their attacks. Maybe if there is a way to dodge the attacks, it might be easier. I hope you a great evening! (or night, it's past 10:00 PM lol)
There is a way, the green bar to the right tells you if you can dash or not, if its red you can not dash. But if its green press C to dash. Dash has a short cooldown.