Controls:
Arrow Keys = Walk
Space = Raise Head
Space + Arrow Keys = Walk Fast

(from Newgrounds:)

After years of development, we're finally ready to show you a glimpse of what our huge "PickleMan Begins" game is going to be like! For a limited time, you lucky Newgrounds viewers have been selected to participate in our public beta test of the game. Please let us know what you think! We're extremely excited to finally share some of this game with you guys! Hope you like it as much as we do!!!!

Controls are:

Arrow Keys: Move
Space: Head Raise
Space + Arrow Keys: Move Fast

Other Keys: ?