So here, Right arrow: move right, Left arrow: Move left, Space: Punch. Simple. Or you can just click the a button and he'll move where you want him to and just click him for him to punch.
Note: this is in pre alpha. This is EXTREMELY buggy and simple (only having one enemy). This was made by yours truly, me. Shoog. Thank you :) Update 1, Mobile Mode: added mobile mode (unfinished)