excellent first flash!
good attention to detail.
I'd make sure there's always music going if there's also action. when he was running some good chase music could've picked up the tension.
from a story standpoint, it's not really clear what he's running from. Is he some kind of test subject? if so, why didn't they try to get him without harming him? how did he get out so easily? ect.
5/5
~Qwerty